FreeFileSync: Update to 13.6

[ZachBacon]

Summary

Compact parent path display for medium/large row sizes
Fixed crash when mouse inputs are queued due to system lag
Don't steal focus from other app when sync progress dialog is shown
Fix crackling sound at the beginning of WAV playback (Linux)
Prevent middle grid tooltip from covering sync direction
Disable Nagle algorithm for SFTP connections 

This is also patched to make use of wxwidgets 3.2 gtk3, but also patched to find it's resources in /usr/share/freefilesync.

Also here's a note, FreeFileSync doesn't quite appear right under dark themes.

Test Plan Ensure things run, syncs, etc. Between folders and other storage

Checklist

• [x] Package was built and tested against unstable

[ZachBacon]

Apologies for not getting to this sooner. I'll finish this up asap after I take care of a few other things.

[davidjharder]

Marking this as draft until someone commandeers it to fix.