Andreas Brauchli authored Aug 20, 2016 and Jens Georg committed Feb 23, 2019

Instead of following the current selection, the map now follows the page.
Thus, all marker pins now remain on the map when the selection changes.

Introduce a new highlighted state (different from the selected state.)
The highlighted visible state takes priority over the selected state.

A marker group is shown as selected when it contains a selected marker.

When clicking on a marker group, all grouped photos (and only those) will
be selected in the library window.