Install icons for tray as PNG

CMakeLists.txt

src/images/icon-busy_128x128.png

src/images/icon-busy_16x16.png

src/images/icon-busy_22x22.png

src/images/icon-busy_24x24.png

src/images/icon-busy_32x32.png

src/images/icon-busy_48x48.png

src/images/icon-busy_64x64.png

src/images/icon-normal_128x128.png

src/images/icon-normal_16x16.png

src/images/icon-normal_22x22.png

src/images/icon-normal_24x24.png

src/images/icon-normal_32x32.png

src/images/icon-normal_48x48.png

src/images/icon-normal_64x64.png

utils/linux_make_icons.sh