Habit Goal: Allow custom inputs for goals such as calories consumed and steps

For calories consumed and steps, the only inputs currently available are predetermined options. For example, for calories consumed, you can only select calorie goals in 500 increments so for someone whose calorie goal in 1,750 calories. They either have to pick 1,500 or 2,000, neither of which is accurate. We should be able to specify exactly what we want our goal to be.