Use a large dialog window for the preview modal in post sections

design/style.css

@@ -4326,6 +4326,11 @@ button.token-input-delete-token {
     box-shadow: 0 5px 15px rgba(0, 0, 0, 0.5);
   }
 }
+@media (min-width: 992px) {
+  [class*="Section-Post"] .Overlay > .Popup {
+    width: 900px;
+  }
+}
 .Overlay {
   display: block;
 }

less/core/components/modals.less

@@ -45,6 +45,11 @@
       &:extend(.modal.in .modal-dialog);
     }
 
+    // Use a large dialog window for the preview modal in post sections
+    [class*="Section-Post"] & {
+      &:extend(.modal-lg);
+    }
+
     h1 {
       margin: -@modal-inner-padding;
       margin-bottom: @modal-inner-padding;