Add error handling to group members edit

[taki9]

No description provided.

[sensenet]

Site name	Url	Last deploy
sn-react-component-docs-dev	https://5faaae43dfb700f362b177b5--sn-react-component-docs-dev.netlify.app	Tue Nov 10 2020 - 15:14:27 GMT+0000 (Coordinated Universal Time)
sn-app-dev	https://5fae86b87f77302cabf8ebad--sn-app-dev.netlify.app	Fri Nov 13 2020 - 13:14:33 GMT+0000 (Coordinated Universal Time)

[codecov]

Codecov Report

Merging #1080 (104ccb3) into develop (cbaeb3b) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           develop    #1080   +/-   ##
========================================
  Coverage    92.19%   92.19%           
========================================
  Files          217      217           
  Lines         5933     5933           
  Branches      1540     1540           
========================================
  Hits          5470     5470           
  Misses         463      463           

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