Fixes unexpected error after opening an imported game.
Improves cloned scene name.
Fixes Credits link.
Renamed MockupEmptyRenderer -> EditorEmptyRenderer
Refactor draw method in EmptyRender, to use a tinted drawable
instead of a dedicated asset
Removed MockupEngine, set component processor in Engine
Merge pull request #783 from RotaruDan/openGameFix

Fixes unexpected error after opening an imported game.
Merge pull request #784 from RotaruDan/clonedSceneName

Improves cloned scene name.
Merge pull request #785 from RotaruDan/smallCreditsLinkFix

Fixes Credits link.
Using Engine Initializers to better stablish components processors
Merge pull request #786 from anserran/refactorempty

Refactor in EmptyRenderer
Get text input the first time a text is added to the scene.