Edit "Auto-add" tags, assignees and due dates shortcodes rather than replace them

One of my favourite features on Quire, is the ability to assign tags, assign tasks and set due dates with shortcodes, "Buy eggs #shopping @me <Tomorrow>" But when editing a task via the text field, all those codes are hidden, "Buy eggs" and editing it via the text feed again, to add tags or add people to the task overwrites tags already set. Which is fine if you only have 1/2 tags. But if you have tasks with multiple tags, you have to either edit it all with the mouse in the side bar, or write all the tags from scratch in the text field.

I propose that when a task is edited, those shortcodes are maintained in the text field. i.e when you create a task "assemble new wardrobe #diy #bedroom #decorating", and when you double click the task to edit it, it keeps the shortcodes there, "assemble new wardrobe #diy #bedroom #decorating #hammertime", so that you can simply add to or remove from them all with the keyboard, making tagging on Quire friendlier for power users.