Summary:
Fix this issue:
When using “Change Widget” for a chart of a summary table, if I change group-by columns, the X-Axis dropdown becomes empty, and lists values from previous summary (not the actual summary table that’s now shown in the chart). Need to close and reopen creator panel to fix it.
Test Plan: Include nbrowser test
Reviewers: georgegevoian
Differential Revision: https://phab.getgrist.com/D3284