[Bug 886867] Fixing mosaic display overlap on Nexus 7.
[Bug 889755] Fixing incorrect display of persona button on non-homepage logged out pages + added a min-height for those pages.
Merge pull request #539 from juliaelman/889755-fixing-persona-button

[Bug 889755] Fixing incorrect display of persona button on non-homepage ...
Merge pull request #536 from juliaelman/886867-mosaic-overflow

[Bug 886867] Fixing mosaic display overlap on Nexus 7.
bump vendor to fix django downgrade