recent_topics: Handle no rows case on `r` keypress.
recent_topics: Handle no rows case on `r` keypress.

When there are no rows for user to reply on `r` keypress,
we open compose box with everything empty.

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