Post-update wgpu sprint

[almarklein]

After each update I like to take a bit of time to revisit old issues, check the source for todo's etc. This lists some of the stuff post v0.17.2.1

• Renaming rs backend to native #393
  • Refactor backends #408
• Investigate memoryleaks #353
  • Add tests for object releasing #403
  • Rust panic after creating hundreds of renderers/canvases #275
  • Measure memory usage during memtests #411
• Memory usage tracking #356
  • Track object usage #399
• [Qt, Windows] Crash when switching from monitor to monitor with different DPI values #352
  • Investigated, leaving open until new API arrives.
  • Provide extra tip for fixing monitor-swap error #385
• Use weakrefs in add_event_handler? #318
  • Warn about refs in add_event_handler #398
• Show useful warning when there is no wgpu-native binary #298
  • Add warning about pip when binary is missing on linux #376
• Making buffer mapping part of the public API? #114
  • Buffer mapping API #377
• Stop forcing Vulkan on Windows #382
• Refactor autogui selection to take imported backends into account better #384
  • Fix bug introduced in auto-gui refactor #396
• Utils lazy import #386
• Clean docs and (unused) API #388
• A small stab at get_compilation_info #389
• Flags can be passed as str #390
• Wheel event inconsistencies pygfx#583
  • Update event spec vispy/jupyter_rfb#78
  • Add timestamp to events, and buttons to wheel events #397
  • Release jupyter_rfb
  • Bump jupyter_rgb version here
• Update two comments #395

[almarklein]

done ...