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Optional behaviour
Magnolia should offer an index, e.g. located next to the scrollbar as we know from current touch devices, for large, sorted and non-hierarchical lists to allow to quickly jump to a certain position of in the list.
Magnolia could offer inertial scrolling as seen of today's touch devices to allow users to quickly navigate large data sets without loosing track of where they are. This would be especially useful on said touch devices, but may actually be a function required to be offered by the browser.
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