Use ListView; add ViewColumn abstraction

Use ListView; add ViewColumn abstraction

Punting FormView since we really only need ListCtrl and using
ListView makes the header column and window resizing work.
The ViewColumn abstraction eliminates some copy/paste code blocks.
HDN_ITEMCHANGED tracks user changes to column widths.
Remove CTreeCtrl-related code.
Also remove some unused code that was generating warnings.

Signed-off-by: Kevin Wasserman <kevin.wasserman@painless-security.com>
ticket: 7249 (new)
queue: kfw
target_version: 1.10.4
tags: pullup