Remove dependency on Faker::Hacker

Doesn't seem like this module is supported as well...
Remove custom WebKit scrollbars
Show title regardless of entries
Fix help icon in submissions page floating too far
Active item in main nav, hover over link
Remove unused subsubmenu
Merge pull request #1955 from arkon/rm-scrollbars

Remove custom WebKit scrollbars
Merge pull request #1957 from arkon/spreadsheet-ctrls

Show "Current marks spreadsheets" subtitle for TAs
Merge pull request #1958 from arkon/submissions-help

Fix help icon in submissions page title floating too far right
Merge pull request #1960 from arkon/tags-nav-2

Tags navigation
Merge branch 'master' of https://github.com/MarkUsProject/Markus into git