i18n'ed announcements pages.
i18n'ed groups pages.
i18n'ed mailarchive pages.
Fixes for broken tests
different layout for changing language
small text adaptions for gdcr
i18n'ed mailsender page.
i18n'ed members pages.
extracted strings for statusmessage
i18n'ed wiki pages.
Merge commit '192d08dfda81a8e6cbe797e60f0de5513fcff921'

Conflicts:
	locales/translation-de.json
	locales/translation-en.json
i18n'ed waitinglist page.
bugfix
fixing tests
i18n'ed some of the general pages.
Wiki test now uses testHelper.createApp.
Merge commit 'f2a24cfe7be5b32ce7e8bec83d45485dae2dfb3e'
Text changed slightly.
i18n'ed activities pages.
Merge pull request #537 from NicoleRauch/master

Internationalization :-)