give post tool dropdown min-height

it starts empty since its rendered after clicking the toggle

public/scss/generics.scss

@@ -26,6 +26,10 @@
 	overflow-x: hidden;
 }
 
+.moderator-tools .dropdown-menu {
+	min-height: 300px;
+}
+
 .category-list {
 	padding: 0;