Added new strings
Added new edition components without functionality
Added new constructor method
Changed the constructor method
Formatted
Format, refactoring and small bug fixes.
Added EngineView to edition screens.
Added Undo/Redo buttons with functionality.
Improved MockupEngineView to scale itself to fit the aspect ratio of the game's resolution.
Removed tagsTextField from Mockup's edition screen.
Fixed a bug that would cause an exception if we created/opened
another game with an edit scene that hasn't got any children.
Fixed a bug with the tagsTextField when it wasn't created.
Rebased and fixed some bugs with new API changes.
Merge pull request #196 from RotaruDan/PanelsEdition

Edition panels.
Fix (ApplicationAssets instead of EditorGameAssets)