[#6970] Make user icons on activity page larger and fix alignment in Firefox

Signed-off-by: Cory Johns <admin1@users.sf.net>
[#6830] Fix test to account for changed menu

(The activity tool is no longer hidden.)

Signed-off-by: Tim Van Steenburgh <tvansteenburgh@gmail.com>
Merge branch 'master' of https://git-wip-us.apache.org/repos/asf/incubator-allura