Edit Menu in 2.1

At the moment, only BXE and OneForm appear in the Edit Menu (by default). This 
is configured in, e.g.

   src/modules/xhtml/config/menu.xml

I'd like to see all installed editors included here.

A number of possibilities:

1. Detect installed editors at runtime and construct menu accordingly.

  Plus: easiest way for users
  Minus: might not be easy to implement

2. Detect installed editors at build time and construct menu accordingly.

  Plus: relatively easy to implement
  Minus: difficult to change editors later

3. Put all possible editors in menu, but disable the menu entry for editors
    that are not installed.

  Plus: relatively easy to implement (?)
  Minus: might confuse users


What do you think?

   Rainer