At the moment one can only configure min/max (-2/+2) or all (-2 .. +2)
votes as sticky, but sometimes it's e.g. wanted that all negative
(-2, -1) / all positive (+1, +2) votes are sticky. Instead of adding
sepcific copy rules for this (e.g. copyNegativeScore and
copyPositiveScore) allow to configure indiviual votes as sticky. This is
more flexible and can cover all possible scenarios.
E.g. we could use the new copy rule to make positive votes in the
homepage repo sticky which e.g. helps with visualising consent on design
docs (see issue 12025).
Bug: Issue 12025
Signed-off-by: Edwin Kempin <ekempin@google.com>
Change-Id: Ia8d1b634bc76123db9fc1ec0667e17c3e9e27204