fix(menu): remove background color

[LEEHONCN]

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[codecov]

Codecov Report

Merging #804 (d405547) into master (3e981dd) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #804   +/-   ##
=======================================
  Coverage   89.93%   89.93%           
=======================================
  Files         151      151           
  Lines        5164     5164           
  Branches     1365     1365           
=======================================
  Hits         4644     4644           
  Misses        513      513           
  Partials        7        7           

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