Side View “Welcome” screen and extension panel do not change color scheme based on the applied default Dark/Light themes

[acornestean]

[Affected versions]:
Firefox Release 129.0.2
Firefox Beta 130.0
Firefox Nightly 131.0a1

[Affected Platforms]:
Windows, MacOS, Linux

[Steps to reproduce]:

1. Enable the default Dark theme
2. Install Side View version 0.6.5727 (based on the current master branch https://github.com/mozilla/side-view/releases/tag/0.5rc7) via about:debbugging
   OR
   via “Install Add-on From File” in Add-ons Manager (after setting xpinstall.signatures.required to false in about:config)
3. Open the sidebar and observe the sidebar “Welcome” screen
4. Open the extension panel from the extensions button on the toolbar and observe the panel
5. Disable the default Dark theme so as the default theme is automatically reapplied OR enable the default Light theme
6. Observe the sidebar “Welcome” screen
7. Open the extension panel from the extensions button on the toolbar and observe the panel

[Expected result]:

1. The sidebar “Welcome” screen color scheme should change based on the applied Dark/Light themes
2. The extension panel color scheme should change based on the applied Dark/Light themes

[Actual result]:
Both the sidebar “Welcome” screen and the extension panel color schemes do not change based on the applied Dark/Light themes.

Dark theme applied:

Default/Light theme applied:

[jaredhirsch]

Looks like dark/light theme management was added in #239 but perhaps we can do something a little simpler now.