0.5.14: `navigator` autoscroll, better rim highlighting, better force visualization

0.5.14 is a minor release with some nice-to-have improvements:

• The Navigator panel in the model editor now automatically scrolls to the selected component when selecting the component via some other panel (e.g. a 3D viewer, reported by @mrrezaie, #908)
• Added Point Forces and Point Torques visualization options, which enables drawing force vectors in their point-force form (as opposed to their reduced body-force form). This feature currently only works for ExternalForces in the model (#904) and GeometryPaths (#907).
• The Show Forces' Linear/Rotation Component option was reworded to Forces on Bodies and Torques on Bodies to reflect what's actually being shown.
• The rim highlights now more-clearly distinguish between hovered, selected, hovered+selected elements in the scene when they are overlapping (#24).
• The documentation now contains work-in-progress tutorials for the mesh warper and model warper UIs.
• The (experimental) model warping UI is now available from the splash screen. Note: it's still in development, and things may break!