Roadmap automatic vertical scrolling behaviour (first step is initial scroll position)

Problem

As we changed the design of the roadmap to make it so that each epic has its own row, we created the problem that the roadmap now follows a waterfall way of displaying.

As a result of this the user will have to scroll down in addition to scrolling horizontally to see epic which are scheduled earlier or later.

Proposal

Part 1

Implement an initial vertical scroll position

When loading the screen, as said before, the screen will be positioned with "today" in the middle. However as the amount of epics load, this could mean that the epics that are near or touch "today" are positioned out of view (as they are below the fold).

So this change could load up an initial vertical scrolling position to make it easier for users to find epics closest to today.

Part 2 (prob in a second issue)

Implement scrolling behaviour where the vertical (and possibly the horizontally as well) scrolling is hijacked.

This will mean that the vertical scrolling is automatic when scrolling horizontally (and vertically) making it so that when an epic to the left is out of view, the page automatically scrolls down, in order to make the current view's oldest epic the upper most one (placed at the top).