getApplicationImage() in SparkManager.java

Hi,

while working on icons for spark, i found out that getApplicationImage() returns the 64x64 spark image. Since the getApplicationImage() function is usally used for smaller sized images such as 16x16, the downsized 64x64 image sometimes looks ugly.

What you guys think about to change the return value to the 16x16 (TRAY_IMAGE) image instead?