When importing new wells, consider all wells when connecting multi segment wells
Make sure that import of individual well paths will give the same ordering as importing all wells in a single operation.
* Improve handling of MD at first target
* When sea level well target is disabled, update MD of first target
* Show well target spheres by default, allow toggling of spheres
* Activate well target modifiers when clicking on well targets
* Remove selection update causing an unstable 3D view
* Improve display and handling of multiple locations
* Add special 3D target for tie in well target
* Add slider to tie in MD input field
* Show MD in well path target table
* Delete all well path laterals when deleting a well path
* Python : Add lateral to parent well
* Python : Add perforation interval
Based on branch https://github.com/OPM/ResInsight/tree/system-msw-refactor
- Move completion settings to property of well path
- Rename to RimFishbones
- Export implicit COMPSEGS for fishbones main bore
- Add valve for each branch
- Increase version number to be able to handle import of legacy project files
