Allow to swipe over characters

This is on top of !76 (merged). Instead of cancelling a character when moving to the next we accept it instead.

With this and swipeGuess

$ gsettings get sm.puri.phosh.osk.Completers.Pipe command
'swipeGuess /path/to/wordsSorted.ttx'

there's no need to lift your fingers. Demo https://social.librem.one/@agx/110260534404795348

Marking as draft since we want to move the key repeat / "cancel vs accept" to either a configuration options or allow the completer to configure it.

Signed-off-by: Guido Günther agx@sigxcpu.org