Use smaller image for about dialog
Use smaller image for about dialog

icon.png is a bit too large for about dialog.

It is not suitable when screen resolution is not enough.  For example,
screen resolution is WXGA (1366x768) - typically for note PC, bottom
buttons are hidden.

kenhys/growl-for-linux,xenithorb/growl-for-linux,mattn/growl-for-linux,kenhys/growl-for-linux,xenithorb/growl-for-linux,mattn/growl-for-linux