4.16.4

- Bookmarks no longer need an existing, underlying file (Issue #47)
- Regression: Select copied files after copy operation (Issue #520)
- Reintroduce alternative zoom shortcuts (Issue #514)
- Prevent hangup if a copy task that is blocked is resumed (Issue #467)
- Regression: Allow custom image files for UCA icons (Issue #517)
- Dont merge folders when creating copy with same name (Issue #491)
- Fix incorrect return value in scroll event handler (Issue #512)
- Translation Updates:
  Galician, Hebrew, Italian, Occitan