GitLab

See BAUHAUS-380

Task-number: BAUHAUS-380

previously.

We should not polute the Qml Qt 4.6 namespace

See BAUHAUS-322

I added more checks for undefined - there should be no warnings left

increasing the size of the property editor a bit

Checking for undefined and null everywhere is the only way to fix this
right now

I polished and refactored most of the property editor (again)
I introduced more custom widgets with expression editing, fixed bugs
and polished the visual design