Ramon unch snap in rc work

[RamonUnch]

Fix Windows not snapping on task-bars on secondary monitors. Also allows to have other bars that are not the standard window taskbar.

The rcWork field of the monitor is used instead of the lprcMonitor parameter in the EnumMonitorsProc function. This also removes the need to specifically search for the Taskbar window. in the Enum() function

Fixes: https://github.com/stefansundin/altdrag/issues/108