Prevents console errors when that.showError doesn't exist.
fixes issue #2815
fixes #2844
fixes #2846
fixes issue #2818
Merge branch 'develop' of github.com:divio/django-cms into develop
increase value
make sure menu is still visible
set offset using css
make sure the success message is not blocking the second column and added message that changes might require a refresh
Replace fix with code as directed by @FinalAngel
Merge pull request #2847 from digi604/fix-2844

fixes #2844 (add page on same level)
added some new tests and minimized queries
pyflakes fix
Merge branch 'develop' of github.com:divio/django-cms into develop
reduces queries for publish
Merge pull request #2848 from digi604/fix-2846

fixes #2846 (deleting pages with different sub languages)
fixes issue #2822
as per request use solid line and correct color
use tabs