CEGUI buttons trigger even when they are hidden or disabled

[MrDadosz]

Describe the bug
When you hold LMB on CEGUI button and get cursor (from inventory script etc.), you can click RMB to trigger that button even if it's now hidden or disabled. Watch my video to understand it.

To reproduce
https://youtu.be/qKl7lDGSS3s
cegui_bug.zip

Expected behaviour
CEGUI should update when you change it visibility or enabled/disabled state

Version
v1.5.7-release-20348

** Additional informations **
You have to destroy GUI after leaving marker or manually check with script but it should work without manual checks.

	if not guiGetVisible(gui.button) or not guiGetEnabled(gui.button) then
		return
	end