Log Message:
Update wm/pekwm to 0.1.15.

Upstream changes:
-----------------

Release-0 1 15
Bugs fixed

    #251 "MaximizeOverHarbour & "Toggle HarbourHidden" \ 
incoherent behaviour"
reported and fixed by wallex
    #282 "adobe flash fullscreen don't cover taskbar" reported by \ 
dkmatt0 and
fixed by Andreas Schlick.
    #300 "pekwm restart makes 100% CPU" reported by specnaz and fixed by
Andreas Schlick.
    #304 "Fullscreen option" reported by Thom1 and fixed by Andreas \ 
Schlick.
    #306 "titlebar clicking separator problem" reported by MezkoV and \ 
fixed by
Andreas Schlick.

User visible changes

    Allow CfgDeny-ing struts via autoproperties - done by Claes Nästén.