Give the links-row label class an intentional rule

Author: fiskus

quilt-sync/ui/assets/css/components/workflow_select.css

@@ -77,3 +77,10 @@
 .qui-workflow-link:hover {
   color: var(--q-ui-palette-text-primary);
 }
+
+/* The "Open in catalog:" prefix. Color and size inherit from the row; the
+ * nowrap keeps the label from breaking mid-phrase on narrow dialogs. Also
+ * the styling hook for the planned visual polish of this row. */
+.qui-workflow-links-label {
+  white-space: nowrap;
+}