Ui enhancements 2.0 (#31)

* canvas overhaul

* minor tweaks

* list mode for overview

* bugfixes + tweaks for editor 2.0

* minor tweaks

* more editor work

* refactor + new transitions

* use layout() where appropriate and cleanup

* mouse triple click + textEntry scroll ind

* cleanup

* cleanup + theme editor

* color rework + cleanup

* changes for deprecated ui methods

* can now use named colors

sys/modules/opus/gps.lua

@@ -65,7 +65,7 @@ function GPS.locate(timeout, debug)
 	if debug then
 		print("Position is "..pos.x..","..pos.y..","..pos.z)
 	end
-	return vector.new(pos.x, pos.y, pos.z)
+	return pos and vector.new(pos.x, pos.y, pos.z)
 end
 
 function GPS.isAvailable()