Sidebar: always link to moderator info

[A user suggestion][0] from /u/Motha_Effin_Kitty_Yo.

Aside from the url hacking, the only previous way to get to this page was to
click the more link for subreddits with "too many" mods.  Since this
information is public, we might as well make it easily available no matter how
many mods there are.

[0]: https://www.reddit.com/r/ideasfortheadmins/comments/2mqmj2/provide_a_view_about_link_in_moderator_box_even/
Improve moderator info page title

Since this page is accessible to non-mods, it doesn't make much sense to title
it "edit moderators" - people who can't edit anything can see it.

Also, while I was messing around in here, I noticed the titles we put on these
pages are awfully generic.  I didn't want to touch too many things, so we're
only adding a subreddit suffix to this page.