well labels at bottom of wells

[Angus Yeh]

(by Mike and John)

When wells are crowded, well labels can be hard to read because they are placed at well head at the moment. One possible solution is to allow user choose to show well labels at well bottoms. (Common deviated wells drilling spread out from the same well pad.)

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long term: make display of well head/tail/label/layer-crossing more flexible.

[Angus Yeh]

This is implemented after merging Lydia's scene-items. See merge commit 1e59385183.