add Copy/Paste functions
Show current Element!
change some if conditions
add function onClick currentElement ist set & show on PropertyGrid
fix some bugs
fix some bugs
bug fixes
commentary the new Methods
Merge branch 'WorkLizzard'

Conflicts:
	Editor/Controller/EditorController/PreviewController.cs
	Editor/EditorWindow.cs
	Editor/EditorWindow.designer.cs
add function currentElement is marked

add function currentScene is marked
add function copy/paste