scrolling / dragging the screen with right mouse button

[Xerberus86]

hey, the current methods of moving the view is by:

- edge scrolling (which 80% of the time is kinda not working for me :/)
- wasd-keys
- arrow keys
- clicking & holding the middle mouse button

.. i would like to do the ladder with the right mouse button (maybe switch the function for middle mouse button and right mouse), or give us the option to do to (options menu).