Fix content view in Mobile browsers

Steps to reproduce:

• Navigate to a folder containing ~8 documents.
• Swipe up on the screen to see the last document in the folder.
  => Documents are hidden from view.
• Continue swiping until documents appear.
  => Hamburger icon disappears.
  => Left menu items are inaccessible.
  => Logout is impossible.
  => Last documents in folder are visible.

View screencast here