Modify `DiffView` and Diff Plugin to support comparing two commits
We need to modify the DiffView
class to handle comparing two commits, right now the comparing happens when the GitgDiff
Plugin gets a signal from the History
View class indicating that the selection has been changed.
We need to figure out the best way to modify the DiffView
Class and the GitgDiff
Plugin to support our new feature as well as not breaking the original implementation