add support for failIfMajorPerformanceCaveat

CHANGELOG.md

src/apps/viewer/app.ts

src/apps/viewer/index.html

src/extensions/geo-export/ui.tsx

src/extensions/mp4-export/controls.ts

src/mol-canvas3d/canvas3d.ts

src/mol-plugin-ui/controls/screenshot.tsx

src/mol-plugin-ui/viewport/canvas.tsx

src/mol-plugin-ui/viewport/screenshot.tsx

src/mol-plugin-ui/viewport/simple-settings.tsx

src/mol-plugin/config.ts

src/mol-plugin/context.ts