Update Display for Select All

[Andreas Höschler]

Hello all,

this seems to be a little bug in NSTableView. "Select all" actually 
does select (internally) all rows in a NSTableView but this change is 
not made visible until one touches the scroller and moves it a bit to 
trigger the display update. This problem occurs only, if the scroller 
is at the top. If it is anywhere else, NSTableView does the update.

Any ideas (which methods to check)?

Regards,

  Andreas