posted message and the quit flag is set.

With assistance from H. Verbeet.

caching the ID of the string to load before overwriting it with an
Alloc call.

Get rid of the no longer needed 16->32W mapping functions.

Get rid of the no longer needed 32W->16 mapping functions.

Make the column resizing smooth in full drag mode even for listview
with lots of elements by redrawing only the resized column and calling
UpdateWindow.

- create an abstract interface for contexts, and use it for certificates
- create a simple context list, and use it for memory stores