Fix outdated setting layouts (admin & user page) and wrapping some strings
with t()

<fieldset> tags were not used in css files and this was causing settings
to be seen unaligned (enable admin_migration and see the admin page
for example).
changed all fieldsets into <div class='section'> instead.
minor tweaks with layouts
Merge branch 'master' into fix-outdated-setting-layouts

Conflicts:
	xmpp/templates/adminSettings.php
	xmpp/templates/userSettings.php
Merge pull request #1739 from owncloud/fix-outdated-setting-layouts

Fix outdated setting layouts (admin & user page) and wrapping for translation