* Allows filtering of examples
* For some reason, the ui designer ignored the courier font family so I manually inserted it into the .ui file
* Allows filtering by file content, too
* Respects dark mode (maybe?), fixes policy setting on code layout
* Prevents "run edited code" from showing unless the actual content changes
* Looks like black font is always best against highlight background
* Left test code in commit...
* Fix broken highlighting on PyQt6
* Address #133
* Better highlighting for both dark and light mode
* Minor refactoring/cleanup, uses combo box instead of checkbox
* Combo box below text edit to avoid clipping
Co-authored-by: njessurun <ntjessu@gmail.com>
