stream-settings: Add space between # and stream name in title.
stream-settings: Add space between # and stream name in title.

This commit adds space between # and the stream name appearing
at the top in right column in stream settings overlay.

rht/zulip,kou/zulip,andersk/zulip,kou/zulip,zulip/zulip,zulip/zulip,andersk/zulip,kou/zulip,rht/zulip,andersk/zulip,zulip/zulip,andersk/zulip,rht/zulip,andersk/zulip,zulip/zulip,zulip/zulip,kou/zulip,kou/zulip,andersk/zulip,rht/zulip,andersk/zulip,zulip/zulip,rht/zulip,kou/zulip,rht/zulip,zulip/zulip,rht/zulip,kou/zulip