changes to support early events (even without gui)
Revert "changes to support early events (even without gui)"
This didn't fix what it was intended to

This reverts commit 1f6f6bef3a1c955c46983377e447e6f3e627eb4e.
UI is earlier available
added service
moved UIs to gui/
replaced Lua4RSTickThread with service tick()
removed useless option