The chart widget currently concatenates the line title (display name / legend label) with the property name to form the legend label. When the property title is already descriptive and self-explanatory, this concatenated format (for example, "Deployments — avg_cost") adds unnecessary noise instead of improving clarity. In a lot of cases, the label gets truncated.

Users should have the option to display only the line/property title as the label when the full concatenated format is not needed.