The icon cannot carry the product's sentence, so it carries the shortest
true part: something is beating and you can see it.
Three candidates as plain SVG geometry, all rendered through make_icons.py
and judged at 32px rather than at full size. A rows (workload table),
B tab carrying a pulse, C pulse alone. B is the most specific idea and
needs simplifying; A is the clearest and the least distinctive; C wins at
16px but says health monitor, not browser.
Signed-off-by: Christian Sass <csass@binaryranch.com>