Basic shortcut key functionality. Minor chatbox changes

[AstroPsynapse]

• Shortcut keys added:

  • F1 - Live Mode
  • F2 - Buy Mode
  • F3 - Build Mode
  • F4 - Property Mode
  • F5 - Options
  • +/- - Zooms view in/out (2D & 3D)
  • </> - Rotates view left/right (2D & 3D)
  • Home/End - Steps walls up/down
  • Page Up/Down - Ascends/descends the active floor
  • WASD/Arrow Keys - Pans the camera (2D & 3D)
  • CTRL+F1 - Toggles the debug menu (This was changed to prevent conflicts with the Live Mode shortcut key)

• Chatbox changes

  • The chatbox will now automatically focus when it is opened.
  • Pressing Enter in the chatbox with an empty message will toggle its focus.
  • Pressing ESC while the chatbox is focused will erase any message being typed.
  • Pressing ESC while the chatbox is focused with an empty message will remove its focus.

[riperiperi]

I will review this today. Sorry for the delay, my setup usually differs so much from master that I can't test things without recloning the repo, and I don't have much disk space. 😵