* Add Action System
- Add keyboard test
- Add context menu label
- Add PanelComponent
* Show context menu items based on actions
* Add render action feature
- Replace bringForward etc buttons with action manager render functions
* Move all property changes and canvas into actions
* Remove unnecessary functions and add forgotten force update when elements array change
* Extract export operations into actions
* Add elements and app state as arguments to `keyTest` function
* Add key priorities
- Sort actions by key priority when handling key presses
* Extract copy/paste styles
* Add Context Menu Item order
- Sort context menu items based on menu item order parameter
* Remove unnecessary functions from App component
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