We add live update support for user group events as part of
https://github.com/zulip/zulip/issues/19526.
This however has a few TODOs:
1. Deciding on how we want to sort the group list on left of
#groups overlay.
2. How we highlight the newly created groups after it is added
to the list.
These will be covered as we add support for more groups events.
Add support for creation of user groups using right panel
of new user group settings overlay being developed as part
of https://github.com/zulip/zulip/issues/19526.
In further commits we will add support for editing user
groups using right panel of the overlay.
This commit also introduces a minor bug related hashchange
for #groups which would be a quick fix once we have UI
for group edit on #groups overlay.
