Insert toolbar improvements

[StephenUK]

Janrif. Thank you.

This toolbar could, I think, be improved.

It provides buttons for insertion of different types data, which is really quite useful, and something most other organizers do however basic they are. However, it would work better if:

1. It was customizable so as only to have the desired buttons.

2. It is a bit of a pain having one toolbar to insert siblings and another to insert children. In my view, it would be better to have one toolbar for both.

3. It would be good if the individual buttons for a given type of insertion were different for children than for siblings.

4. I would like to be able to attach customizable buttons tied to templates.

5. It would also be useful to be able to attach short-cut keys to the various buttons.

6. And, of course, it needs to be robust, which it isn't at the moment.

In my view, this toolbar ought to be the most important one there is in UR, instead of which it seems a bit of an afterthought. Still, I'm glad to have what there is all the same.