In the area where the pointer lines cross the revision bars, the hover effect of the bars does not work anymore. See
This is due to the fact, that the div container of the lines is now shown above the bars to draw the line through to the pointers.
We could move the lines back to the background and instead let them end at the end of the bars with a little colored border at the bottom of the bar as in the original mock with the blue bar in https://phabricator.wikimedia.org/T160410
See: