Silence warnings in sass

Author: sevein

ui/vite.config.mjs

@@ -13,6 +13,10 @@ export default {
     preprocessorOptions: {
       scss: {
         additionalData: `@import "src/common/global.scss"; @import "src/common/style.scss";`,
+        // Silence deprecation warnings emitted by bootstrap 4.x or our own code.
+        // We won't be able to migrate to Dart Sass 3.x unless we deal with these.
+        quietDeps: true,
+        silenceDeprecations: ["legacy-js-api", "import", "color-functions", "global-builtin"],
       },
     },
     postcss: {