villebro opened a new pull request #15084:
URL: https://github.com/apache/superset/pull/15084


   ### SUMMARY
   Currently clearing the Value filter's values leaves the native filter 
indicator showing as Applied despite no filter having been emitted. This is due 
to the label being set to a falsy string value `''`, despite being checked with 
a [nullish coalescing 
operator](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Nullish_coalescing_operator)
 which only identifies `undefined` and `null` as `false`.
   
   ### BEFORE
   A filter that has previously had values but is cleared shows up as set 
(gender):
   
![image](https://user-images.githubusercontent.com/33317356/121511109-fc782b80-c9f0-11eb-8458-f2715ba6df32.png)
   
   
   ### AFTER
   Now the indicator correctly shows as unapplied:
   
![image](https://user-images.githubusercontent.com/33317356/121510922-cfc41400-c9f0-11eb-8d51-6b6a14873374.png)
   
   ### TESTING INSTRUCTIONS
   <!--- Required! What steps can be taken to manually verify the changes? -->
   
   ### ADDITIONAL INFORMATION
   <!--- Check any relevant boxes with "x" -->
   <!--- HINT: Include "Fixes #nnn" if you are fixing an existing issue -->
   - [x] Has associated issue: closes #15072
   - [ ] Changes UI
   - [ ] Includes DB Migration (follow approval process in 
[SIP-59](https://github.com/apache/superset/issues/13351))
     - [ ] Migration is atomic, supports rollback & is backwards-compatible
     - [ ] Confirm DB migration upgrade and downgrade tested
     - [ ] Runtime estimates and downtime expectations provided
   - [ ] Introduces new feature or API
   - [ ] Removes existing feature or API
   


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