[Kst] kdeextragear-2/kst/kst

[George Staikos]

CVS commit by staikos: 

Remember the last active window and restore it.  Remembers it with a node in
<windowsize> which maybe isn't completely ideal, but it's easier than storing
an <active/> node in the window since that would require iterating through the
windows and storing a flag, or walking the XML again.  Maybe we'll get to clean
the XML up one day and fix this then.

Also cleans up KstApp::inst(), app, and parent() usage to be uniform.

FEATURE: 98559


  M +52 -40    kstdoc.cpp   1.148