feat(editor): Show notification about mode switches triggered by input

[kanru]

Fixes #506

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.70%. Comparing base (dfe0e82) to head (cbca96b).
Report is 3 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #610      +/-   ##
==========================================
+ Coverage   89.49%   89.70%   +0.21%     
==========================================
  Files          40       42       +2     
  Lines        8602     8714     +112     
==========================================
+ Hits         7698     7817     +119     
+ Misses        904      897       -7     

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