Revert scroll bar changes

[destanyol]

So the old backgroud-color gets restored.

[codecov]

Codecov Report

Merging #393 into master will not change coverage.
The diff coverage is n/a.

@@          Coverage Diff           @@
##           master    #393   +/-   ##
======================================
  Coverage    6.49%   6.49%           
======================================
  Files          39      39           
  Lines        2557    2557           
======================================
  Hits          166     166           
  Misses       2391    2391

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[coveralls]

Coverage increased (+0.001%) to 6.424% when pulling 99500f0 on destanyol:patch-1 into 3f6f753 on IJHack:master.