bug#11588: 24.0.97; Left mouse click setting the mark every time?!??

[Tobias Bading]

> The old mouse dragging code had a special behavior to pop the mark if
> you did not move the mouse much after the down event, to avoid setting
> the mark (this did not work reliably; if you move the mouse a little bit
> between the down and up events, the mark gets set anyway).

HURRAY, I'm not losing my mind! Thank you, Chong! A slight mouse movement 
between the mouse down and up events causing the mark to be set in Emacs 23 
finally explains why sometimes I was unable to kill or copy a region with C-SPC 
at point, mouse click there and then C-w or M-w. That is quite a bad bug in 
Emacs 23 then to be honest.

Tobias