Pass theme list & its entries around by reference rather than copying them.
Fix bug in async icon loading that caused icons to be loaded multiple times.
Original PR by @LiquidFenrir
- centralized stop function
- freeing the struct not from the thread while waiting on handle in it
- thread not detached
- maybe fixes hang on exit from HM in ndsp status check loop
If the preview .ogg has a samplerate > the BUF_TO_READ constant, there was an out of bounds write to the audio buffers which resulted in crackling.
Thus, upped it to 48000 (0x80-aligned, and pretty much the highest rate anything consumer goes). a bit big, but safe.
