Sequence quick edit menu improvements

Improved the sequence quick-edit menu:

• Formatted sequences with monospace font so 1s and 0s will line up visually.
• Color coded 1s and 0s for easier visualization of sequences.
• Added hotkeys to facilitate editing sequences:
  • C to copy sequence and V to paste. This doesn't use the real clipboard and doesn't work in the detailed siren menus, it's just a local copy-paste within the quick edit menu. You don't need to press Ctrl. (Regular Ctrl+C and Ctrl+V still works whenever the black text input box is open. )
  • PgUp and PgDown to reorder sirens in the sequence quick-edit menu. This does not affect the sirens themselves in any way, it is only a visual aide in the menu to put related sirens next to each other for easier editing.
  • 🠄 and 🠆 (arrow keys) to shift sequence 1 bit to the left or right. Hold Ctrl to shift 4 bits left/right. Helpful if you've set up a sequence once, and want to shift it to alternate with another (or to appear unsynced).

Demo of new features: