Switching to em values for icon-only button height and width.
We don't need a generic ui-icon class.
Theme: Fixed active checkbox and radio icon background color.
Listview: Correction in count bubble position em value.
Demos: Updated custom icon examples.
Theme: Make the ui-icon-alt and ui-icon-nodisc classes work on both element and container.
Textinput: Removed ui-icon-searchfield class.
Textinput: Changed px to em values.
Loader: Removed ui-icon class. Changed px to em values.