[REFACTOR] simplified code in SarosAnnotation

Merged / removed methods that were needed by the resetColors method.

TODO: move the color stuff from the SarosAnnotation to a separate class.

Change-Id: I45512846351c53d0a07c48a4b22ee20d05966d2f
Reviewed-on: http://saros-build.imp.fu-berlin.de/gerrit/1214
Tested-by: Jenkins CI
Reviewed-by: Stefan Rossbach <srossbach@arcor.de>