Use a more familiar icon for the "Input Devices" category
Right now it uses the preferences-desktop-peripherals icon, which is
problematic on three levels:
- It is not sementically accurate since "peripherals" encompasses far more than just input devices; printers fit under this term too.
- It looks like a graphics tablet, which is one of the least likely input device for the user to have available, beaten out only by a joystick. This makes its recognizability factor quite low.
- A graphics tablet has the same shape as a monitor, so there are two icons right on top of each other with the same basic shape, contributing to the "icon soup" effect.
To make the icon more recognizable to the majority of users, let's
change it to preferences-desktop-mouse which is an example of an input
device and is known to everybody and has a visually distinct shape.
BUG: 449056 FIXED-IN: 5.24
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