- Disables the invite buttons while invites are ongoing
- Adds a keyboard shortcut (Enter) to send out invites
- Closes AddPeopleDialog upon successful invites sent
- Fixes the SecurityDialog closing when trying to set E2EE key via Enter shortcut
- Removes superfluous separator from SecurityDialog

* Fixes inviting more than one participant.

* Shows a notification when participants are invited.

* Adds support for both .id and .user_id props for people query results.

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