Adding insert to the barracks troop selection

When you are selecting your troops in the barracks it would be great for there to be an insert button. This would allow the next selected units to be placed first in the order of construction, and not force a player to cancel their entire army in order to donate troops to a clan mate. This is a selfless request, it's taking care of others first with out messing your own selections up. This is a collective experience that everyone I have played with and you (whom I've never met) have encountered.