Add "Insert Global Options" to qrun

[Ian Clatworthy]

From the https://lists.ubuntu.com/archives/bazaar/2009q4/064496.html thread:

2. Like "Insert Directory..." and "Insert Filenames...", add
   "Insert Options..." and "Insert Global Options..." buttons to help
   build up the parameter list. The first would use the metadata in the
   command object to build a basic form with checkboxes for boolean
   options, combo-boxes for registry options, text fields for string
   options, etc. The second would present a custom dialog that made it
   easy to turn on the various debug options (e.g. -Derror), profiling,
   etc.

This bug tracks the progress of the "Insert Global Options" part.