Graphic assets have been modified so hat they are of the size at which
they are displayed. This makes them safer for browsers not supporting
background-size property.
Bug: 49107
Change-Id: Ifdce9ff5034e2b11d3e1dd24ac649cb99a151312
Extend $.fn.uls render method to add additional rendering of display
settings link.
Add css for the new element.
Add display.png icon from the Agora icon set.
Change-Id: I7a29b4892be02526969b0dd786c74bdb7551c074