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d16cdcf449
This introduces two new options to filter legend elements: - filter by expression: a boolean expression can be set. Only symbols of features that make the expression evaluated to true will be kept in the legend - filter by polygon: only symbols of features that are inside the given polygon will be part of the legend. The polygon filtering is used in particular for a new option in the composer legend that allows to filter out anything that is not included in the current atlas polygon.
