* swkbd: Fix a bug where clicking Cancel hangs the game
The text is validated in `Finalize`. If the validation fails, an error is returned and the applet is not actually finalized. This can result in hangs.
This is usually not a problem as the frontend is expected to validate the text passed to `Finalize`. However, when the user clicked on `Cancel`, the text is ignored and the frontend won't do any validation. Therefore, we should skip the validation here as well.
Also fixed a potential data race. All these functions should now be called on the same thread
* Address review comments
Renamed the fields
Remove close button
* 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
