XWIKI-10609: Active Installs don't work through a Proxy and thus reported figures are lower than they should be
* Made test more generic
XWIKI-10536: Capitalize first letter for buttons when adding a tag.

* Fix failing tests.

(cherry picked from commit 426f5b357c8e72b38ed047dd2f43ee6509397127)
XWIKI-10605 : Add internationalization support to send emails from a Template
* Improve DefaultMailTemplateManager, DefaultMailTemplateManagerTest