The DIGIT filter was incorrectly implemented as preventing all digits. It actually limits the maximum digit count to max_digits, according to ctrulib and hardware testing.
* Addressed comments and removed the applet interface
* swkbd: address @lioncash's comments
* core: more fixes
** Moved registered_swkbd to System
** Removed an usused virtual
** Removed functionality of DrawScreenKeyboard
** Removed src/core/settings.h change
* swkbd: address @lioncash's 2nd review
* swkbd: update logging macro
* QtKeyboard: Make dialog modal and hide help