Add more updates for palettes & shortcuts

-adds "space" & dynamics to F2 palettw
- fixes dynamics shortcuts during text entry and makes them all Ctrl+Shift+(letter)
- adds accidental shortcuts during text entry (Ctrl+Shift+B, Ctrl+Shift+#, Ctrl+Shift+H)
- adds shortcuts for to bring up master palette on correct tab for key signatures (Shift+K), time signatures (Shift+T), and Symbols (Z)

Ctrl+Shift was chosen for the text shortcuts because it had fewest conflicts.  "Ctrl+Shift+#" may not work with all keyboard layouts and all OS's.  Key & time signature shortcuts changed from 1.3 (K & T) to avoid conflicts.