add option to disable querying for labels
Fix: white screen freeze when adding a property

Bug: Create an empty graph with one class without instances. Then choose
'create instance' from the class navigation menu. In the pop over controller,
trying to add a property via the 'Add property' button creates a faded out
screen that cannot be exited by any other means than reloading the OntoWiki
main page.
Enable 'range' lookup in resource widget by default
first test to submit values without reloading

This is a first test to see if it is possible to submit value
with RDFauthor without reloading the whole site each time.
There are many known issues that have to be treated later. Also it will
right now only work for literal and resource widgets. Also the reloading
has to be disabled in the support.js (silverblue theme), which is done in a
separate commit.
clean up some debug console.logs from last commit
Merge branch 'feature/rdfauthor-FormBuilder' of https://github.com/AKSW/RDFauthor into feature/rdfauthor-FormBuilder