allow entity or tag to be chosen without preselecting text

[jchartrand]

As it stands if you select a tag or an entity without having already selected some chunk of text you get an error. We'd like to allow end users to select a tag without having to preselect text. This will probably cause problems with the end user knowing in what context they are working (in what tag they are positioned.) Another issue will be entered to create a new label beside the drop down that indicates the current tag. Hopefully this will help.

We may also want to allow the end user to 'turn off' a tag after they've clicked it. But that could be, for now, done by deleting the tag over in the left panel. Maybe, though, we could look at allowing clicking on the context label I described above, to turn off the current tag (removing the tag completely if there is nothing in it, otherwise closing the tag if there is something in it. By 'closing' i mean moving the cursor to just outside the tag (to the right.)

[ajmacdonald]

Done for structure tags, not implemented for entity tags yet.