passed AlConfiguration to images editor
added modified label's text to editor's form and refactored links editor template
removed unused class
fixed translations
Script bundle did too much, so it has been semplified and now just only a script can be added
PageTree sets merged assets back to the Template
fixed some translations
removed internal and external javascripts and stylesheets management from AlBlockManager
removed external assets management
removed _internal_javascript.html.twig due to AlBlockManager changes