Towards a sane character dialog

Towards a sane character dialog

This is a proposal, but I think you should try it out in order to comment

What this does, is:

1. Remove the toggle madness. This is really not something anyone
understands without knowing the code, and its very unusual UI
(fixes #4836)

2. Separate and group things that were put all into the "Misc" trashcan
combo

3. Let the dialog reflect the font settings at cursor (selection)

Now the dialog looks more like character dialogs from other applications,
and I think it is more in line with what users expect.

Comments very welcome (and of course I will revert if you want to have
the old idiosyncratic thing back).