- Level Editor (continued...)
    - press F4 to toggle between playing a level and editing a level
- Level Editor (continued...)
    - ensure MiniMap is destroyed when switching from playing level to editing level
    - set editor's scale to be 50% initially
    - remove mouse events when destroying editor
- Level Editor (continued...)
    - fixed bug: Ensure Crafty.stage.x and Crafty.stage.x are updated when editor toolbar is shown, otherwise worldToIso() returns an incorrect pos
- Level Editor (continued...)
    - fixed bug: When shutting down the editor make sure the current edit mode toolbar button is unselected so that reopening the editor behaves as desired
- now using Handlebars templating to populate the html body