Flow: Improve "Show Contributing Wells" command

[JacobStoren]

• Used in the active view should not be dependent on the default Well Alloc Plot, and edit the view it operates on.

Used on a Allocation Plot, it must not edit the active view directly as to day, but instead:

• Show list of possible views, select the view last used by this command. Or active view (if applicable) Or first view. Add a button "Use New View"

The selected/created view must be activated when the operation is done.