Provide information on included elements per insert tag

[fritzmg]

My idea is to make a button called Search for insert tags… which opens a pop up where the search takes place. The search would go through the complete DCA and search for any kind of text input type and then search these fields for insert tags in the database. Plus, we could search for insert tags in all the files of the /templates folder (and its subfolders) as well.

This could take a long time of course (hence the on demand button).