IME: New buttons Action and Minimize + new optional mode where swiping moves cursor/selection

[Kaljurand]

• new menu under the IME settings to select the new IME mode. This mode is the default on the Watch, but currently non-default everywhere else.

• behavior of the new mode while recognizing: same as the old mode, i.e. swipe to delete and add a newline

• behavior of the new mode while not recognizing:

  • button Delete: deletes char on the left of cursor, or deletes selection (if present); holding the button keeps deleting chars
  • move left: moves cursor to the left
  • move up left: moves cursor to the left faster
  • move right: moves cursor to the right
  • move down right: moves cursor to the right faster
  • long press: enters the "selection mode", where the above movements change the selection (i.e. just one "side" of the cursor); in case there is no existing selection, then select the word (\w+) next to (or under) the cursor
  • single tap: cancels selection
  • double tap: adds space at cursor
  • press the left edge of the IME: moves cursor to the left
  • press the right edge of the IME: moves cursor to the right

• GUI in the new IME mode:

  • hide buttons when in cursor moving mode
  • lightgrey background when in selection mode
  • show cursor direction/speed in the message bar

• extension of the GUI in both IME modes:

  • the search button was generalized to an "action" button, i.e. it performs a different action (currently: "search", "next' or "new line") depending on the type of the text field (search field, title field, regular text field)
  • the keyboard button is replaced by a down-arrow during dictation to allow one to collapse the UI (showing only the dictation result, action button, and an up-arrow). This is useful when dictating longer, wanting to expose more of the text area, and not caring about touch commands.