Using the system tray

When the program is running, in the system tray there is a small icon, which may look differently depending on the program's state.

	if the program found at least one printer and the current one has't any exhausting cartridge
	if the program didn't find any printer or the current one has at least an exhausting cartridge

In the icon's context menu there are almost all the actions living under the file menu.

When the program's main window isn't visible, eventual warnings are shown through balloons in the system tray.