Init page composer
Add ability to remove child blocks from list + Add loader indicators
Apply select2 on ajax responses
Implement sortable container children blocks
Use ajax call to update blocks after edition
Fix block name after update if it's empty
Fix sortable for freshly created blocks
Add 'orphan' blocks
Improve display + Add font-awesome for resizable/colorable icons
Add ability to drop blocks on template preview
Update child count on block parent switching
Add drop animation