Unload per unity by U

Having to select each vehicle for unloading when it stops is quite annoying.
And while this may be done intentionally, to shift the focus to automation, there are many times during the game when it is necessary to do so.
Especially annoying are the trucks that have collected dirt, arrived and are standing with a full body at the end of the field planning.
I would like to be able to circle the trucks with the stuck cargo icon with a "unity frame" and release them with one click.