Column show / hide mechanism, and convert the queue list page to use it for the existing columns.
Some more columns.
Selectable columns in channel list.
Selectable columns in connection list.
Aesthetics.
Selectable columns in vhost list.
Fix message rates breakdown
Just strip this out; I suspect no one in the world cares but if they do we can bring it back with +/- columns.
Merge bug 26382.