[TASK] Add cursor:pointer to info headlines in backend

Related: T3DEMO-248

src/extensions/site_t3demo/Resources/Private/Scss/t3skin_override.scss

@@ -128,6 +128,7 @@
 	}
 
 	&__header-label {
+		cursor: pointer;
 		position: relative;
 		width: 100%;
 	}