Fixes profile contribution colors
requested to merge KartoffelCheetah/dark-gitlab:fix-profile-page-activity-rect-background into develop
In new gitlab versions the rectangles do not have a fill attribute but
custom data-level attributes are used.
The previous opacity styles were not applied anymore resulting in opacity 1 for all boxes.
Signed-off-by: KartoffelCheetah kartoffel.cheetah@gmail.com