Fix Landing Behaviors
How to Verify: The avatar should now land on the ground from jumps as in PotS. Therefore, standing jumps produce a full landing, downhill jumps produce a blended landing based on how far down the avatar fell, and uphill jumps produce no landing.
DST Fix
Original implementation by Adam Johnson, with some bug fixes by Christian Walther.
Includes a fix for plUnifiedTime::SetGMTime not working correctly when the given time falls into local DST.
Basic clipboard functionality
Adds following commands to single- and multiline edit boxes: Ctrl-C - copy field contents to system clipboard Ctrl-V - paste contents of clipboard at current cursor position
The default value of the "dst" argument must be 0, because -1 leads to incorrect results when the given time falls into local DST. However, a "dst" argument makes no sense on a method that deals with GMT anyway, so remove it entirely.
The bounds type test was performed on stale bounding data from the previous
frame resulting in the avatar being drawn without textures for a frame after
switching from 1st to 3rd person camera.
