[FIX] website: remove website_email_designer.js from asset to fix website editor; Load ace with menu insead of editor
[IMP] website: move promote menu into content; use icon to reduce the top bar size
[IMP] website: change layout for editor; fix display of button into content
Merge remote-tracking branch 'dev/trunk-website-integration-sle' into trunk-website-integration-icon-csn