[frontend] Fix changing view in Knowledge (#4965)

[lndrtrbn]

Proposed changes

• A check was made before to ensure the value of the new view is valid, but in a recent commit this check was removed, add it again.

Related issues

• In Knowledge views, clicking on the "Entities view" button or the "Relationships view" when active make the UI disappeared #4965

Checklist

• I consider the submitted work as finished
• I tested the code for its functionality
• I wrote test cases for the relevant uses case
• I added/update the relevant documentation (either on github or on notion)
• Where necessary I refactored code to improve the overall quality

[lndrtrbn]

Something is bothering me, even if this fix prevent from facing this issue again, if you already faced it it won't fix it as the issue corrupts the local storage with a null value. And so, even with this fix, your local storage still has a null value that leads you into a blank page.

You can have a look at EntityStixCoreRelationshipsIndicators.tsx to see why.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (f0d7ba1) 87.27% compared to head (01022db) 87.27%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #4971   +/-   ##
=======================================
  Coverage   87.27%   87.27%           
=======================================
  Files           3        3           
  Lines         220      220           
  Branches       55       55           
=======================================
  Hits          192      192           
  Misses         28       28           

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