0.37.0

[Base][Edit] Fixes for release 0.37.0 (#612)

* [Base][Edit] Fixes for release 0.37.0

- Refactor ginger edit template to not overrule so much
- Remove template in base that needed zotonic 0.50

* [Edit] Refactor edit js include so no duplicate editor.tpl are included

* [Edit] Add fileupload for multi upload support