subs: Do not remove stream row when unsubscribing using hotkey.
subs: Do not remove stream row when unsubscribing using hotkey.

We do not remove the stream row instantly from the subscribed list in
subscription overlay when unsubscribing from public streams in most
of the cases but we do so when unsubscribing using hotkey.
This commit makes it consistent by not removing the stream row on
unsubscribing using hotkey.

We also not remove the 'active' class as streams settings is still
open in the right seciton and this behavior is also consistent with
the other ways of unsubscribing.

Note that this behavior is only for public streams, we remove the
stream row in case the stream is private, as user cannot
resubscribe himself and this behavior is consistent across all ways
of unsubscribing.

eeshangarg/zulip,rht/zulip,eeshangarg/zulip,kou/zulip,zulip/zulip,kou/zulip,kou/zulip,hackerkid/zulip,kou/zulip,hackerkid/zulip,andersk/zulip,andersk/zulip,hackerkid/zulip,rht/zulip,andersk/zulip,punchagan/zulip,punchagan/zulip,andersk/zulip,zulip/zulip,eeshangarg/zulip,andersk/zulip,andersk/zulip,punchagan/zulip,kou/zulip,rht/zulip,eeshangarg/zulip,eeshangarg/zulip,hackerkid/zulip,rht/zulip,hackerkid/zulip,punchagan/zulip,hackerkid/zulip,zulip/zulip,punchagan/zulip,kou/zulip,rht/zulip,zulip/zulip,eeshangarg/zulip,zulip/zulip,rht/zulip,punchagan/zulip,andersk/zulip,eeshangarg/zulip,zulip/zulip,zulip/zulip,rht/zulip,kou/zulip,hackerkid/zulip,punchagan/zulip