do not show disabled streams in selection modal

[rtertiaer]

What does this change intend to accomplish?

Disabled streams no longer show up in the selection dialog. This PR fixes #574

Checklist

• Have you checked to ensure there aren't other open Pull Requests for the same update/change?
• If applicable, have you updated the CHANGELOG?
• Does your submission pass linting & tests? You can test on localhost using ./scripts/test

[codecov-commenter]

Codecov Report

Attention: 156 lines in your changes are missing coverage. Please review.

Comparison is base (132a762) 51.60% compared to head (ec512ea) 51.50%.
Report is 12 commits behind head on main.

Files	Patch %	Lines
amplipi/streams.py	26.31%	42 Missing ⚠️
amplipi/rt.py	24.00%	38 Missing ⚠️
amplipi/display/epd2in13_V3.py	0.00%	27 Missing ⚠️
amplipi/app.py	62.96%	10 Missing ⚠️
amplipi/ctrl.py	85.36%	6 Missing ⚠️
amplipi/display/einkdisplay.py	0.00%	6 Missing ⚠️
amplipi/hw.py	84.37%	5 Missing ⚠️
amplipi/updater/asgi.py	0.00%	5 Missing ⚠️
amplipi/eeprom.py	33.33%	4 Missing ⚠️
amplipi/extras.py	0.00%	4 Missing ⚠️
... and 5 more

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Additional details and impacted files

@@            Coverage Diff             @@
##             main     #593      +/-   ##
==========================================
- Coverage   51.60%   51.50%   -0.10%     
==========================================
  Files          24       24              
  Lines        5676     5677       +1     
==========================================
- Hits         2929     2924       -5     
- Misses       2747     2753       +6     

Flag	Coverage Δ
unittests	51.50% <47.29%> (-0.10%)	⬇️

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[linknum23]

In the future we may want to indicate that streams are disabled in settings->streams. For now this works great, both RCA inputs and normal streams respect the disabled flag.