* done
- not done

* If I see a Prelude.something, don't import qualified Prelude unless it's
already there.  Importing turns off the implicit unqualified import.

* Scale.All didn't find Derive.Scale.All like it should have

/ Didn't want to import Ui.Types when I already have Types imported
unqualified.
  I think this is working as intended, because an unqualified import can also
  be used qualified.

* Doesn't understand that 'import X as Y' is the same as
'import qualified X as Y'

- If I set Util.Map in prio-module-low or Data.Map in prio-module-high, why
does Util.Map still get imported?  It's because local modules are always
prioritized above package ones.  To fix this I could have a ad-hoc map of e.g.
'Map -> Data.Map' to manually set certain resolutions.

* Bug: never import the current module

* Bug: Track imported Cmd.Lang.LTrack, should match entire component, not
just prefix.

* Exception should be Control.Exception, not Exception

* Read per-project priorities so e.g. it looks for Data.Map before Util.Map
or Util.PPrint before App.PPrint

* Also need prio within system libs, e.g. GHC.* modules should be low prio

* Should search in subdirs of current top level module name?  E.g., in
Derive.Call.Note, Internal gets Cmd.Internal, not Derive.Deriver.Internal

* Index should use Text instead of String

* IO should be System.IO, not Data.Text.Lazy.IO
  And Process should be System.Process, not System.Posix.Process

- If the choice is still ambiguous I could ask interactively.

- Or write a simple tool to analyze existing code and assign priorities
based on how often each is imported.