Uses icon font for column selection
Uses icon font for column order selection
Fixes code style
Makes menu more accessible
Cleans up main menu initialization

Triggering the expandation of the selected menu moved from base
layout to application.js.
Removed call to not ..

existing expand_current_menu method

- makes 'you are member' indicator readable by sreensreaders on
  projects#index
Fixes search for selected menu item
Merge pull request #934 from opf/fix/link_comprehensibility_4123

[FIX] Link comprehensibility 4123