Keyboard Shift Mode (#1333)

* Add "shift" concept to keyboard

* Better shift colors

* Better keybaord layout for symbols

* Start ShiftLocked for consistency with previous UX.

* Fix number layout

* PR and test-drive feedback

firmware/application/ui/ui_textentry.cpp

@@ -21,9 +21,7 @@
  */
 
 #include "ui_textentry.hpp"
-//#include "portapack_persistent_memory.hpp"
 #include "ui_alphanum.hpp"
-//#include "ui_handwrite.hpp"
 
 using namespace portapack;