* Fix black text after graphic pack is disabled in dark mode
* Fix background colour of audio debugger in dark mode
* Make placeholder game list icons black when using dark mode
* Some tweaks to the HotkeySettings window:
- Make strings translatable
- Makes the column headers bold for clarity
- Makes the border darker on Linux, fixed by @goeiecool9999
- Make the column headers have some padding to make it look nicer.
