[MERGE] backend front end integration

Render the top-menu (backend menu or frontend editbar) server-side.
Use Fontawesome icons (mail, timezone, chat).
Refactor website widgets, split Website.editorBarin editorbar, ace, editorbar- content, editorbarCustomize.
[IMP] add case_default selection field and job_ids,stage_ids many2many field in hr_recruitment and change demodata