settings: Add periods to end of bot permissions strings.
settings: Add periods to end of bot permissions strings.

This improves consistency with how all of our other settings tip
elements are written.

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