Do not lock when no sync is necessary
Avoid strange PHP error
add missing if before unlockSync
Merge remote branch 'github/3.3' into 3.3
Make expression return 0 or 1

If not, whereEquals was not evaluated correctly
synctree move fix

moving under root didn't work
fix synctree visible icons change
Revert "Do not lock when no sync is necessary"

This reverts commit ae545f924384b9dbef6f9d7d928addf2af4b956a.
it breks Kwf_Model_MirrorCache_SlowMirror_Test
Revert "add missing if before unlockSync"

This reverts commit 590962bfb4785de21679be71730a0bbf0c3ead9b.
alternative implementation for lock recursion fix
only display buttons in synctree which are enabled
Take a '0' string als false
Remove E-Mail priority from Articles component since it's not used
Make width of priority select smaller
Support clickableLink Renderer in Excel Export
Add translations
Merge branch '3.1' into 3.2

Conflicts:
	trl.xml
Merge branch '3.2' into 3.3

Conflicts:
	trl.xml
Fix problem with copy of page from one domain into another

The problem was that there where different root_category components with a different class
and the old code cleared only the cache of the source root_category component but not of
the target component. Now the cache of the target root_category component is cleared and
the new copied componend is found.
Fix problem with recursive call

Clear cache of all root-category components to ensure the new copied
page-component are found.