Needed to display charge levels for devices with few discrete charge values.
This is how the test file looks. The text input on the right is not part of SegmentedProgressBar.
This is currently a draft because there is no actual use for this at the moment. This was made to represent the charge levels for devices with few discrete charge values, but I don't think
Solid::Battery actually exposes a property that could be used to know how many discrete charge values there should be.