Update JS dependencies and misc tweaks (#21583)

- Update all JS dependencies to latest version
- Disable two redundant eslint rules
- Adapt stylelint config to codebase
- Regenerate SVGs
- Make file editor spinner "reserve" height so page does not shift
- Tested katex, swagger, monaco

Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: 6543 <6543@obermui.de>

.stylelintrc.yaml

@@ -16,6 +16,7 @@ rules:
   declaration-empty-line-before: null
   function-no-unknown: null
   hue-degree-notation: null
+  import-notation: string
   indentation: 2
   max-line-length: null
   no-descending-specificity: null