(breaks PE temporarily)
Adds a Standard/Music Application Mode button to SE and thus adds the
ability to run ME scan types in SE. When in Music mode, the
Music-specific results window, details panel and preferences panel will
show up.
All preferences except scan_type become shared between app modes
(changing the pref in a mode changes it in the other mode).
Results Window and Details Panel are now re-created at each scan
operation because they could change their type between two runs.
Preferences panel is instantiated on the fly and discarded after close.
This is a very big merge operation and I'm trying to touch as little
code as possible, sometimes at the cost of elegance. I try to minimize
the breakage that this change brings.
This unit hosts previously awkward UI view methods which weren't related
to the view itself, but to the current desktop environment. These
functions are now at their appropriate place.
