Merge lp://qastaging/~macslow/unity/unity.fix-844889 into lp://qastaging/unity

Fixed issues:

- Category header icons are too large
- The font size of category header titles is too larged
- The search result icons are too small
- The search filter toggle boxes are too high
- The search filter toggle boxes are too narrow
- the search box is too short
- The the font size of the text underneath each icon in the search results is too large
- The size and shape of the arrow that points to the currently selected Dash Lens is incorrect

See:
http://people.canonical.com/~mmueller/fix-844889-1.jpg

Issues that can't be fixed, because it would introduce some sort of regression or would otherwise cause breakage:
- The search box is positioned wrong (centre should align with the center of the BFB, should start a few px to the left)
- There is too much space between the individual icons in the search result
- There is too much space below each category header
- The desktop dash box is much too large (both height and width)
- the expand/collapse triangle is the wrong shape and size
- the expand/collapse triangle is missing from the filter results category headers

NOTE: We're still also waiting for an ACK regarding the UIFe from the documentation-team