Issue #3002443 by markconroy, lauriii, smustgrave, larowlan: Improve preview usability

(cherry picked from commit cc24ab06c9)

core/profiles/demo_umami/themes/umami/css/components/content/node-preview.css

@@ -0,0 +1,20 @@
+/**
+ * @file
+ * This file is used for node preview styling.
+ */
+
+.node-preview-container {
+  position: initial;
+}
+.node-preview-form-select {
+  display: flex;
+}
+.node-preview-backlink {
+  display: inline-flex;
+  align-items: center;
+  margin-inline: 0 auto;
+}
+.node-preview-container .form-item,
+.node-preview-container .form-actions {
+  margin-block: 0;
+}

core/profiles/demo_umami/themes/umami/umami.info.yml

@@ -46,6 +46,8 @@ libraries-extend:
     - umami/classy.media_library
   user/drupal.user:
     - umami/user
+  node/drupal.node.preview:
+    - umami/drupal.node.preview
 
 regions:
   pre_header: Pre-header

core/profiles/demo_umami/themes/umami/umami.libraries.yml

@@ -222,3 +222,9 @@ classy.search-results:
   css:
     component:
       css/classy/components/search-results.css: {}
+
+drupal.node.preview:
+  version: VERSION
+  css:
+    theme:
+      css/components/content/node-preview.css: {}