message: vendor.scss: add patternfly/dropdowns scss
  PF3/Bootstrap 3 Dropdowns are still used.
diff: @import "~bootstrap-sass/assets/stylesheets/bootstrap/utilities";
  @import "~bootstrap-sass/assets/stylesheets/bootstrap/responsive-utilities";
  @import "~bootstrap-sass/assets/stylesheets/bootstrap/popovers";
  +@import "~bootstrap-sass/assets/stylesheets/bootstrap/dropdowns"; // required by @patternfly/react-console
  @import "~patternfly/dist/sass/patternfly/mixins"; // Including this file breaks sourcemaps
  @import '~patternfly/dist/sass/patternfly/type';
  @import '~patternfly/dist/sass/patternfly/buttons';
  +@import '~patternfly/dist/sass/patternfly/dropdowns'; // required by @patternfly/react-console
  @import '~patternfly/dist/sass/patternfly/breadcrumbs';
  @import '~patternfly/dist/sass/patternfly/hint-block';
  @import '~patternfly/dist/sass/patternfly/modals';
  