Reduce max height of text extract

Currently .mwe-popups-extract keeps some empty space after the last
line. This shifts a little when zooming in causing part of the text
of the next line to be visible. Reducing this to have lesser extra
empty space solves the problem.

Bug: 73551
Change-Id: I968fca23fe2de04cb3f73ba4e7d4f676fbf88536
Merge "Reduce max height of text extract"