FLOE-207: Added tooltips

Implemented the tooltip feature for bindDialog and updated the styles to match the latest wireframes.

http://issues.fluidproject.org/browse/FLOE-207
Consider factoring out all of this configuration into a separate grade, so that it is more reusable and the parent definition is easier to use. What you could do is create two grades - 
gpii.metadata.feedback.dialogTooltip - holding this definition - but with the name {bindDialog} replaced by, say, {tooltipHolder}. 
and
gpii.metadata.feedback.tooltipHolder - which is empty, but applied to "bindDialog" so that it can be IoC resolved. The only piece of non-generic looking configuration is {bindDialog}.options.strings.buttonLabel - which you can leave behind as the sole piece of direct configuration which remains here inline. e.g. this definition would now appear as
tooltip: {
    type: "gpii.metadata.feedback.dialogTooltip",
    container: "{bindDialog}.dom.icon",
    options: {
       content: "{bindDialog}.options.strings.buttonLabel"
    }

and everything else would go into the grade definition.