AUI-1327 The color picker popover's height is bigger than the window height

One of the jshint commits (https://github.com/mairatma/alloy-ui/commit/b0c7e968858b8beb2ac55b43fd6976db06172773#diff-2) changed some code from aui-color-palette.js by mistake, probably a rebase error.

I'm bringing back the old code here, and also taking the change to fix a few minor bugs from the bootstrap 3 transition, such as:
(1) One element that was still using span6 instead of the new 'col-...' bootstrap css classes
(2) An icon that was still using 'icon-...' instead of the new 'glyphicon glyphicon-...' css classes