Change bar graph "ticks" option to "labels"

[#47632253] [#44616153]

To be more consistent. Also we no longer render ticks, but only labels
so this name makes more sense.
Support "units" option in bar graph definition

[#47632253]
Make bar graph labels right-aligned

[#44616153]
Enable clamping of bar graph values

[#44616153]

As previously bar could be higher than its container sometimes.
Replace all thermometers with new bar graphs

[#47632253]