* translation system and unit tests
* Translations everywhere
Dont use translation merge
It is not available with PHP builtin gettext, so it would have lead to inconsistency.
- buttons_toolbar: now expect links represented by an array instead of HTML content
- fields_toolbar: now expect a form represented by an array instead of HTML content
- action_plugin: now expect links represented by an array instead of HTML content
Default templates updated accordingly
mprove theme dependent plugin placeholders:
