Plan view time filters

As a project manager, i want to be able to set a time frame that my view goes to so that I don't end up scrolling and looking in the plan view 2 years ago.

As a project manager, I want to set a number of days for my plan view so I never scroll back farther than that and get lost.

AC: PM can set a number of days and if they scroll to the left in plan view it wont go past that number of days back