Enhanced Legend Titles & Label Options for Dual Y-Axis Charts (BLW)
Description
Introduce flexible options to adjust legend titles and add multi-row legend labels, especially useful for charts with dual Y-axes. This feature will allow users to present legends with clear, customized titles, enhancing data understanding when each Y-axis represents different metrics. We also aim to add additional label options at the top of charts, like time range and chart content legends, giving users more ways to add context. Titles should work similarly to Y-axis titles (such as LINDAS dimension names) and be clickable to open a Details panel. Add a "Show legend title" toggle and an option to set custom titles as needed.
Scope
Currently we don’t show legend title in the segmentation feature. We think it would make sense to display it like we display e.g. Y axis title (dimension name coming from LINDAS, which can be clicked to open Details panel). The scope of this task is to add a “Show legend title” toggle, if we should also allow setting custom titles.