Changes: * Fixed an issue where the language model wouldn't get deallocated * Enter key no longer turns into an emoji key in IM text fields * Added a dedicated emoji key (this can be disabled in settings) * Added theme options for key borders and disabling popup hints * Added experimental "touch typing mode" in developer settings (tap the version code a bunch of times), which hides all keys. Useful to reduce OLED burn-in, but does not affect suggestion bar currently * Removed some potentially sensitive native logging * Added pre-alpha text to spacebar (if not overrided by language name)