Selecting Partial Mash will also activate the Mash Efficiency calculator which, if you're steeping grains for flavor and/or color only, would not be needed. Although this would not hurt anything in your process, it's just not necessary and there is a steep timer available.
Not sure if this also existed in the past versions, but the latest version has a Steep Timer in the Timer tab. With "Extract" selected as the recipe type, click on the Timer tab and the steep temperature and timer functions become available for adjustment at the bottom of the first timer window ("Mash/Steep Timer"). Set your desired temperature and time and the mash timer now becomes your steep timer.