Nested QEventLoops are scary. Ultimately we shouldn't use them, but I
have no better solution right now.

fixes #656

might fix #656

fixes #657

Remove 'respond to key requests' functionality

See merge request !10

Fix a few UI things

This is so viewing profiles from the invite dialog will work as expected.

Open room members when member info label clicked

Most noticeable in the goose chooser.

QML all the things, part 1

This fixes binding loops and gives it a (in my opinion) sane size.