In sorted mode, how do you move a task to become a subtask of another task?

The only way I can do it is:

• select a task which will be the parent task
• make a subtask there, usually I just name it "1"
• select the the task I want to move -> Cut it
• select task "1"
• press Paste which will put the cut task under "1"
• delete "1"

This is one of the rare things that annoy me a bit in Quire. I hope you will figure out a way to make this simpler, because this method almost requires engineering ^_^'