Tweak "Download All" and "Manage Submissions" layout

[jmgasper]

Topcoder would like to see something like this:

[jmgasper]

@suppermancool - This looks better, but I'm not seeing a margin to the right of Download All on Safari:

[suppermancool]

@jmgasper done in
work-manager-issue-1505.patch

This patch against commit ccdb8a3 (develop branch)

[jmgasper]

Looks good, thanks!