Add restrictions in get_children calls

[hellerve]

This PR extends the get_children calls in the various view files to always restrict() appropriately.

I didn’t add a test case, because I didn’t quite know how and where to best. If you want one, LMK, I’ll try to figure it out.

Cheers

[peteeckel]

Thanks again - testing this is actually a bit tedious. If you can spare the time you can do so, but I'll also be fine without it.