[Completion] Bug 444486: Highlight proposals when all are used

Change-Id: I1f4fde3fd02b6f29d9a452a88343de7a384f5bde
Signed-off-by: Simon Laffoy <simon.laffoy@codetrails.com>
Signed-off-by: Johannes Dorn <johannes.dorn@codetrails.com>
Merge "[Completion] Bug 444486: Highlight proposals when all are used"