Update zLib copy in plugin compressor folder
Cache color management setting (system vs custom)

See #103
Standardize hand cursor behavior across various dialogs and UCs

VB's inherent "MousePointer" setting can cause trouble for child
controls (e.g. the controls set within picture boxes on the Preferences
dialog).  To avoid this trouble, I've reworked some of the hand cursor
functions to better account for this.
Updated language files

Had to fix a problem where control captions with "end" in them were
being mistaken as "End" statements in form property descriptions.
Staying atop language issues is a never-ending battle!