Fix EZP-23584: Impossible to edit and publish the same content 2 times in a row

This is caused by https://github.com/yui/yui3/issues/1982 and the fix introduces
a workaround for that.
Fix EZP-23583: Added the form handling in the server side part
Improved the templates in the section part to improve the style of the page
Merge pull request #124 from ezsystems/admin_tpl_improved

Improved the templates in the section part to improve the style of the page
Merge pull request #123 from ezsystems/ezp-23583_admin_forms

EZP-23583: As an editor, I want to be able to use forms in the administration part of the PlatformUI App
Merge pull request #122 from ezsystems/ezp-23584_edit_two_times

Fix EZP-23584: Impossible to edit and publish the same content 2 times in a row