Show histogram tooltips that bleed out of content box. #5631
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Motivation for features / changes
The small histogram tooltip can be cutoff by the top or right edges (Googlers, see b/226775031).
Technical description of changes
A couple of ancestor elements of the tooltip element currently set
overflow: hidden
. We change these elements so that the effective value is 'overflow: visible'.This has the somewhat unintended side effect of exposing an additional ~1px height flat line just above the x axis (because the set of lines in the '.content' element ever so slightly overflow). This is probably ok since we'd prefer for the user to see all histogram lines. We should consider in the future tightening up the histogram rendering so that all the lines fit nicely into the '.content' element. (Googlers, see screenshot diffs in cl/437279846).
Screenshots
Tooltip at top before:
Tooltip at top after:
Tooltip at right before:
Tooltip at right after: