First of all, these are now all separate dialogs instead of shoving all
of these functions (which are only marginally related) into one single
dialog. We also convert these to in-app Kirigami Dialogs, which look a
bit nicer. I also touched up the UX in some places, such as adding
descriptions which were previously available to translators. I also hid
some not oft used options like setting a topic, which almost nobody does
before creating a room/space.
If you're a first-time user, the different states on this button may be
a bit confusing. Instead of showing a "plus" sign (meaning an invite) it
will add it to the total notification count. The tooltip text is also
changed to reflect this.
