Pivot Table doesn't render after all values in multi-filter are removed and added again

[rahul-pande]

Issue Summary

Pivot Table doesn't render after all values in multi-filter are removed and added again

Steps to Reproduce

1. Go to http://demo.redash.io/queries/5160#7601
2. Remove all values from the multi-filter
3. Add one or more values in the filter again
4. You will notice that the pivot table is not rendered again

Technical details:

• Redash Version: 2.0.0+b2988
• Browser/OS: Chrome 60.0.3112.90 on macOS Sierra
• How did you install Redash: Not applicable, reproduced on demo instance

As a workaround, at least one value has to be maintained in the multi-filter

[james1293]

If you try this on a filter with the controls shown, it appears that the problem is the controls are being reset. Of course, if the controls are hidden, then the user is stuck refreshing the page.

Redash Version: 7.0.0+b18042

[ranbena]

Tested this locally on master branch and it seems to work ok.

[ranbena]

Perhaps due to #3493