Added some of the javascript and html necessary to update columns on
changes to the tag mapping
Added some necessary markup to enable imageId harvesting and new
selected status application
Added capability to add hidden field per matched tag
Display of single matching tags working
Defaults to no selection if there are multiple
Correctly calculating additions/removals with new system
Selected background colors correctly updating on mapping change
Removed id from selector and class from trs which have been replaced my a positional index to find the elements