Partial solution to this thread:Front-Panel-Editing-easily-selecting-entire-arrays-clusters.
On elements inside cluster and array controls or indicators, this plugin adds a menu option "Select parent". Selecting the menu item will select the entire cluster or array. It will at the moment select the top level cluster\array.
Doesn't work when controls from 2 clusters are selected. For some reason, the parent clusters aren't returned as affected items anymore...
LabVIEW 2018. But can be saved back to 2015.
Put it in the right directory ("<labview directory>\resource\plugins\PopupMenus\edit time panel and diagram"). Restart LabVIEW.