nanotiny_remote.py refresh on mouse click

[mdiea]

First of all, thank you very much for sharing this work!!! Excellent.
I found a problem. The screen update time, when clicking with the mouse, takes 10s to update the whole screen (i.e. until the menu appears), however on the nanoVNA-H screen it updates immediately. So do the traces in the application window (nanotiny_remote.py), but not the menu, it takes longer.
I use windows 10, miniconda and spyder.

[mdiea]

After a few clicks freeze and crash cv2 window

>python nanotiny_remote.py
QMimeDatabase: Error loading internal MIME data
An error has been encountered at line 1 of <internal MIME data>: Premature end of document.:

output.mp4

>python --version
Python 3.12.7

>conda list
# packages in environment at C:\Users\XXX\miniconda3\envs\nanovna:
#
# Name                    Version                   Build  Channel
asttokens                 2.0.5              pyhd3eb1b0_0
blas                      1.0                         mkl
bottleneck                1.4.2           py312h4b0e54e_0
brotli                    1.0.9                h2bbff1b_8
brotli-bin                1.0.9                h2bbff1b_8
bzip2                     1.0.8                h2bbff1b_6
ca-certificates           2024.9.24            haa95532_0
cairo                     1.16.0               hc68a040_5
colorama                  0.4.6           py312haa95532_0
contourpy                 1.2.0           py312h59b6b97_0
cycler                    0.11.0             pyhd3eb1b0_0
decorator                 5.1.1              pyhd3eb1b0_0
eigen                     3.4.0                h59b6b97_0
executing                 0.8.3              pyhd3eb1b0_0
expat                     2.6.3                h5da7b33_0
fontconfig                2.14.1               hb33846d_3
fonttools                 4.51.0          py312h2bbff1b_0
freetype                  2.12.1               ha860e81_0
glib                      2.78.4               hd77b12b_0
glib-tools                2.78.4               hd77b12b_0
graphite2                 1.3.14               hd77b12b_1
gst-plugins-base          1.22.3               hfc3ed34_1
gstreamer                 1.22.3               h1779075_1
harfbuzz                  4.3.0                hb646838_2
hdf5                      1.12.1               h51c971a_3
icc_rt                    2022.1.0             h6049295_2
icu                       73.1                 h6c2663c_0
intel-openmp              2023.1.0         h59b6b97_46320
ipython                   8.27.0          py312haa95532_0
jedi                      0.19.1          py312haa95532_0
jpeg                      9e                   h827c3e9_3
kiwisolver                1.4.4           py312hd77b12b_0
krb5                      1.20.1               h5b6d351_0
lcms2                     2.12                 h83e58a3_0
lerc                      3.0                  hd77b12b_0
libabseil                 20240116.2      cxx17_h5da7b33_0
libbrotlicommon           1.0.9                h2bbff1b_8
libbrotlidec              1.0.9                h2bbff1b_8
libbrotlienc              1.0.9                h2bbff1b_8
libclang                  14.0.6          default_hb5a9fac_1
libclang13                14.0.6          default_h8e68704_1
libdeflate                1.17                 h2bbff1b_1
libffi                    3.4.4                hd77b12b_1
libglib                   2.78.4               ha17d25a_0
libiconv                  1.16                 h2bbff1b_3
libogg                    1.3.5                h2bbff1b_1
libpng                    1.6.39               h8cc25b3_0
libpq                     12.20                h70ee33d_0
libprotobuf               4.25.3               hf2fb9eb_0
libtiff                   4.5.1                hd77b12b_0
libvorbis                 1.3.7                he774522_0
libwebp-base              1.3.2                h3d04722_1
libxml2                   2.13.1               h24da03e_2
lz4-c                     1.9.4                h2bbff1b_1
matplotlib                3.9.2           py312haa95532_0
matplotlib-base           3.9.2           py312hbdc63d0_0
matplotlib-inline         0.1.6           py312haa95532_0
mkl                       2023.1.0         h6b88ed4_46358
mkl-service               2.4.0           py312h2bbff1b_1
mkl_fft                   1.3.11          py312h827c3e9_0
mkl_random                1.2.8           py312h0158946_0
numexpr                   2.10.1          py312h4cd664f_0
numpy                     1.26.4          py312hfd52020_0
numpy-base                1.26.4          py312h4dde369_0
opencv                    4.10.0          py312h4ccfa20_0
openjpeg                  2.5.2                hae555c5_0
openssl                   3.0.15               h827c3e9_0
packaging                 24.1            py312haa95532_0
pandas                    2.2.2           py312h0158946_0
parso                     0.8.3              pyhd3eb1b0_0
pcre2                     10.42                h0ff8eda_1
pillow                    11.0.0          py312hb5480e2_0
pip                       24.2            py312haa95532_0
pixman                    0.40.0               h2bbff1b_1
ply                       3.11            py312haa95532_1
prompt-toolkit            3.0.43          py312haa95532_0
prompt_toolkit            3.0.43               hd3eb1b0_0
pure_eval                 0.2.2              pyhd3eb1b0_0
pybind11-abi              5                    hd3eb1b0_0
pygments                  2.15.1          py312haa95532_1
pyparsing                 3.2.0           py312haa95532_0
pyqt                      5.15.10         py312hd77b12b_0
pyqt5-sip                 12.13.0         py312h2bbff1b_0
pyserial                  3.5             py312haa95532_1
python                    3.12.7               h14ffc60_0
python-dateutil           2.9.0post0      py312haa95532_2
python-tzdata             2023.3             pyhd3eb1b0_0
pytz                      2024.1          py312haa95532_0
qt-main                   5.15.2              h19c9488_10
scikit-rf                 1.2.0           py312haa95532_0
scipy                     1.13.1          py312hbb039d4_0
setuptools                75.1.0          py312haa95532_0
sip                       6.7.12          py312hd77b12b_0
six                       1.16.0             pyhd3eb1b0_1
sqlite                    3.45.3               h2bbff1b_0
stack_data                0.2.0              pyhd3eb1b0_0
tbb                       2021.8.0             h59b6b97_0
tk                        8.6.14               h0416ee5_0
tornado                   6.4.1           py312h827c3e9_0
traitlets                 5.14.3          py312haa95532_0
tzdata                    2024b                h04d1e81_0
unicodedata2              15.1.0          py312h2bbff1b_0
vc                        14.40                h2eaa2aa_1
vs2015_runtime            14.40.33807          h98bb1dd_1
wcwidth                   0.2.5              pyhd3eb1b0_0
wheel                     0.44.0          py312haa95532_0
xz                        5.4.6                h8cc25b3_1
zlib                      1.2.13               h8cc25b3_1
zstd                      1.5.6                h8880b57_0