It would be nice if one could right click on the seedbag and a menu would appear with option 'empty'. This would make the harvesting process much faster. It would save some time that you spend to drop each seed in the bag that you don't need anymore.
It would be done in a way that this option would only appear if the seedbag is already opened. First right click would show what's inside of the bag, second would show the possibility of emptying it.