[1.1.74] In map view zooming while panning causes jitter

[MTyne]

While in map view, holding middle mouse click to pan the map and zooming, causes the map view to jittery behaviour.
The view first zooms towards the mouse cursor and then immediately snaps the zoomed view into the middle of the window. (This is most noticeable when the mouse cursor is far away from the middle of the window. Low UPS also increases effect)
Without panning, the map view zooms towards the mouse cursor instead of the middle of the window.

[boskid]

I am not sure what this bug report is about but there were some changes around zooming while panning already made for 2.0 so i am moving this to Pending.