fix: Allow the mode setup/creation to be async, and provide a few more values to extension/app config/mode setup. (#4016)

platform/app/.webpack/webpack.pwa.js

@@ -108,6 +108,9 @@ module.exports = (env, argv) => {
             globOptions: {
               ignore: ['**/*.min.js.map'],
             },
+            // The dicom-microscopy-viewer is optional, so if it doeesn't get
+            // installed, it shouldn't cause issues.
+            noErrorOnMissing: true,
           },
           // Copy dicom-image-loader build files
           {