new .desktop file entry key

[andres]

Hello,
The entry StartupWMClass is currently used to mach a given window by either 
its ICCCM Window Class or Name properties.

Creating a new .desktop entry StartupWMName used exclusively for Window Name 
and limiting StartupWMClass to Window Class alone will makes this matching 
more intuitive for developers and users editing the .desktop files manually 
or via GUI.

For example: wine sets the Window Class to "Wine" and the Window Name 
to "BinaryFile.exe". In this case we have to set StartupWMClass 
to "BinaryFIle.exe" instead of the current Window Class if we want to match 
the window to the .desktop file.

If we could create a .desktop file with:
StartupWMClass = "Wine"
StartupWMName = "BinaryFIle.exe"

The window manager could do additional .desktop file grouping, matching and 
manipulation by either value. Using a .desktop file manipulation library 100% 
conforming to the standard like efreet. Instead of coding around the 
limitation with an X-tension entry and custom non-standard functions 
for .desktop file matching.

I think this change is trivial enough for the improvement of intuitiveness and 
flexibility it brings to the standard.

thanks for your time,
Andres