Unhardcoded app launcher icon filetype

[palob]

Since you're going to install the icon to a location compliant with freedesktop.org standards you don't need to specify the icon file extension in the .desktop launcher. It will be found anyway.

This facilitates the use of non-PNG (e.g. SVG) app icon themes.
Cf. this example .desktop launcher.

[wwmm]

Nice! I had no idea. I do not even know why it was hardcoded a png file extension when I am shipping a svg icon... This was the first time I ever merged a contribution. Until now I had always used git on my own. I hope everything have gone ok :)

[wwmm]

By the way it would be really nice to have a good icon. I really lack the imagination and the habilities necessaries for this task XD

[palob]

Thanks, I'll note this and see if I can do icons some time :)