Check if creatable is true as a string or a boolean.

package.json

@@ -1,6 +1,6 @@
 {
   "name": "openmct",
-  "version": "1.7.7-SNAPSHOT",
+  "version": "1.7.7",
   "description": "The Open MCT core platform",
   "dependencies": {},
   "devDependencies": {

src/plugins/condition/components/inspector/StylesView.vue

@@ -321,7 +321,7 @@ export default {
             if (item) {
                 const type = this.openmct.types.get(item.type);
                 if (type && type.definition) {
-                    creatable = (type.definition.creatable === true);
+                    creatable = (type.definition.creatable !== undefined && (type.definition.creatable === 'true' || type.definition.creatable === true));
                 }
             }