Version 1.4.0

• Implemented Undo History / Timeline (quickly undo/redo multiple operations)
• Easily show/hide a widget even if there is no visibility property defined (eye icon)
• Added an "All" widgets tab in the Widgets window (in this tab, widgets are sorted by name). The "Widgets" and "Decals" tab remain the same and are sorted by Z-order (this is where you would go to change their respective orders).
• Major redesign of the "Properties" window to only show visibility properties currently in use
• Implemented "drag and drop" to easily add a widget to a visibility group (use "Alt" key to add to multiple groups): drag a widget from the Widgets window and drop onto a group in the Properties window (drag and drop also works from within the Properties window itself).
• Internal complete redesign of the Undo layer to be more flexible and allow "timeline"