"Select all" functionality in List View Widget

Description

We are using a list view widget on a dashboard to display items from different boards. They are grouped by project. When we want to select the items to perform a batch action, we have to select them one by one. In our case it would be very useful to select the whole group, which means to select all elements of the group with one click like it is possible in boards.

What are you trying to achieve

The goal is to have a faster selection.