fix: bug that the Undo button still exist after tap it.

[codecov[bot]]

Codecov Report

Merging #62 (be17024) into master (7e4714d) will decrease coverage by 2.93%. The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master      #62      +/-   ##
==========================================
- Coverage   53.62%   50.68%   -2.94%     
==========================================
  Files           5        5              
  Lines          69       73       +4     
  Branches        5        5              
==========================================
  Hits           37       37              
- Misses         29       33       +4     
  Partials        3        3              

Impacted Files	Coverage Δ
src/components/App/App.jsx	30.00% <0.00%> (-1.04%)	:arrow_down:
src/helpers/localStorage.js	38.46% <0.00%> (-11.54%)	:arrow_down:

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