🐛 Fixed inability to create multi-word tags via post settings menu

closes https://github.com/TryGhost/Ghost/issues/9357
- detect space key being pressed and ignore in the token input's custom `selectOrCreate` action

ghost/admin/app/components/gh-token-input.js

@@ -133,7 +133,13 @@ export default Component.extend({
         return newOptions;
     }),
 
-    selectOrCreate(selection, select) {
+    selectOrCreate(selection, select, keyboardEvent) {
+        // allow tokens to be created with spaces
+        if (keyboardEvent && keyboardEvent.code === 'Space') {
+            select.actions.search(`${select.searchText} `);
+            return;
+        }
+
         let suggestion = selection.find((option) => {
             return option.__isSuggestion__;
         });