Fixed the item type selection interface
Implemented a function to duplicate the slide
First integration of the video element, raises some errors in the AXEL library.
Fixed small issue with toggle menus
Added a label to the different tools
Changed the default custom CSS and the Label of XMl dump buttons
Added an alternative keyboard shortcut for slide navigation
Added an alternative keyboard shortcut for slide navigation
Removed the unnecessary files of the 'tours' folder and moved the rest to the sample folder
Fixed mistake causing an error when trying to load from an html file