Editing existing tag names
It would be helpful to edit an existing tag name, to make it more descriptive, and have that propagate to everything already tagged. For example, I would like to change a first-round tag of "Minutes" to something more descriptive, such as "Minutes Admin Meetings." Right now, I can simply create a new tag and retag all the appropriate items with the prior. HOWEVER, every time that begin to type the name of the new tag, the old not-used one will keep appearing.
If editing an existing name is too complicated, is there a way to delete an old unused tag altogether?