Fix docblock for return values
Add setModel method to FormBuilder
Merge pull request #3083 from PhiloNL/feature/form-set-model

Add setModel method to FormBuilder
Just tweak a doc-block.
Merge branch '4.1-patch-1' of https://github.com/awellis13/framework into awellis13-4.1-patch-1
tweaking doc blocks and return values.
Merge branch '4.1'