Support for Entity Browser Widget

None of the patches do apply against latest dev anymore.

@0livier: Thanks for the improvement suggestions, they make sense.

Not sure at this moment why I had this rather difficult return statement, but I think there was some edge cases to consider. So I did not use your simplified statement here. Feel free to change or explain.

Providing patch based on #4 with suggestions from #5 that applies to latest dev, hopefully.

Fixes need to be in MRs.

The patch from entity browser and this one together works for me. Thanks!

I'll add it to a MR

tim-diels → changed the visibility of the branch 3282292-support-for-entity to hidden.

tim-diels → changed the visibility of the branch 3282292-support-for-entity to active.

Wrong button, oops

Here we go, MR created.