Support for dashboard variables in transformations

Previously, the only transformation that supported dashboard variables was the Add field from calculation transformation. We’ve now extended the support for variables to the Filter by value, Create heatmap, Histogram, Sort by, Limit, Filter by name, and Join by field transformations.

We’ve also made it easier to find the correct dashboard variable by displaying available variables in the fields that support them, either in the drop-down or as a suggestion when you type $ or press Ctrl + Space: