* Separate graph layout code from GraphView.
* Remove formatting and grid layout specific code from GraphLayout.
* Copy edge styles from from main graph view to overview.
* Replace scroll algorithm with just using offset
* WIP
* Text is now shown properly on each node
* WIP
* Scaling well WIP
* Fix positioning for Graph
* Overview properly displays Rect WIP
* Rect in overview moves along with the mouse WIP
* Overview rect properly moves WIP
* mouse properly moves WIP
* in middle of fixing resizing WIP
* scaling issue WIP
* Properly zooms
* almost done
* Edge width fixed for the overview
* Fixed a small bug
* Clean up
