New features and enhancements

• Introduce ui.codemirror element (#2760, #2775, #2913 by @frankvp11, @chrschorn, @rodja, @falkoschindler)
• Introduce ui.chip element (#2942 by @chrschorn, @falkoschindler)
• Introduce ui.scene_view component (#2608, #2947 by @fabian0702, @falkoschindler)
• Add background_color parameter to ui.scene (#2963 by @chrschorn, @falkoschindler)
• Improve performance of 3D scenes by initializing all objects at once (#3009, #3022 by @kovalp, @falkoschindler)
• Improve devcontainer experience (#2964 by @chrschorn)
• Support Quasar's col-* classes in ui.row (#2881, #3008 by @me21, @falkoschindler)

Bugfixes

• Fix layout issues with ui.plotly and reduce unnecessary re-rendering of UI elements (#2917, #2957 by @drummerboy2543, @bmaranville, @falkoschindler)
• Avoid sending UI content twice (#2926 by @Wramberg, @falkoschindler)
• Use a more robust method to check for a client connection (#2915 by @CVxTz, @rodja, @ZAn-next, @falkoschindler)

Documentation

• Add more documentation for ui.keyboard and its event arguments (#2974, #3010 by @ed2050, @falkoschindler)
• Fix exception in the "Infinite scroll" example when the client disconnects (#2966 by @psy0rz, @falkoschindler)
• Fix a broken link on the ui.page documentation (#2990 by @Dronakurl, @falkoschindler)