Update dev.html
Update dev.html

Lots of changes:
- Ace Keyboard Shortcuts dedicated modal
- Cleaned up HASS Components iframe modal
- Cleared out old left over code
- Fixed large padding below filebrowser in desktop view
- Small design change to left sidenav in mobile view
- Added a new FAB to control edits (undo, redo, indent, outdent) Still on the fence about this
- Added find/replace to navbar
- Small touches to the material design to keep consistency
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