Switching light/dark modes doesn't update font color in the graph visualisation

[kalmir]

Describe the bug
After loading the page, if you switch from light to dark mode, and then open the graph viz, node names are not readable as they carry font color from the original mode.

However, if you re-load the page, it starts in your target, already-switched mode, then the graph looks as it should. So reload is needed to make it work as expected.

To Reproduce

1. Load the garden.
2. Switch light/dark mode.
3. Open graph viz via the icon (top right by default).
4. See error.

Expected behavior
Font color of node names should change too after switching the color mode, so you don't end up reading dark-colored text on dark-colored background in the graph (or light on light).

Screenshots

Desktop (please complete the following information):

• OS: Win, MacOS
• Browser: multiple, in all I tried