pyvista/pyvista: Major changes and improvements to BackgroundPlotter

New Features Huge Refactor of QtInteractor to improve stability of BackgroundPlotter (#603, #619). Rename extract edges filters (#610) Exposing tip resolution in pyvista.Arrow (#624) Squashed Bugs Minor doc fixes (#616) Disabled depth peeling by default (#618) Fix increment point size (#609) Disabled rendering on close (#638) Behind the scenes & MISC Using Azure Devops for testing. We made this decision to keep all the testing in one place for Linux, Mac OS, and Windows. Added Mac OS CI testing. Azure made this easy. Added a development docs website at https://dev.pyvista.org/. Anything merged with Master will show up here. Docs are only updated to https://docs.pyvista.org when a release is created Printed directions for movie example. Using meshio>=4.0.0 Contributors Thanks to all those who contributed PRs for this release. Ping me if I missed you, because there was a lot this time around. @adeak @keurfonluu @GuillaumeFavelier @banesullivan @RubendeBruin @imsodin @tkoyama01