Please, apply this also to guild bank...
It's insane, to store an item on guildbank you have to manually drag it, press YES, press YES again and then it will be stored... When you have to store 40 items, it will be a LONG task.
More insane, the guild won't "auto-stack" multiple items, you have to manually find the other item and stack it, which is insane if you have 3 full tabs. We require an easy way to insert items in guild bank, like right click on item => store it in first free slot in bank OR put it on stacks of same type, if one is found.

This is the correct way to handle it.