Ability to add more or open the chronometer for a completed task

After completing a habit, I lose the ability to set a timer for that habit, and adding additional time can be done by navigating menus in a way that feels a bit unintended. The ability to continue when I complete a habit would be nice. I should be able to add 43 minutes to my 30 minute reading habit with a stopwatch in the morning and then add more in the evening when I feel like it again.