* Start working on adding support for panes
See #1000 for the panes megathread on remaining work.
The functionality will be there, but the keybinding won't be there, so people have to
opt-in to it.
* added another method to scroll with keyboard
* set lastscrolloffset to 0
* fixed unused variable
* renamed ViewPort to Viewport
* changed keyBoard to keyboard in the functions, and added expliantion for function
