Added model for generic files
Fix shoortcuts showing in add popups
Set default height to tinymce editor
Added opps plugin to tinymce
moved static javascript to static
removed multi image upload method and added opps_editor_select method for tinymce
Removed more_images widget
Added archives admin and migration for files
Added opps_tinymce.js with media/image dialogs control
Added opps/plugin.min.js to tinymce
AUTOPEP8 :snake: