Add UID to file tooltip

Author: KoBeWi

editor/plugins/editor_resource_tooltip_plugins.cpp

@@ -30,6 +30,7 @@
 
 #include "editor_resource_tooltip_plugins.h"
 
+#include "editor/editor_file_system.h"
 #include "editor/editor_resource_preview.h"
 #include "editor/themes/editor_scale.h"
 #include "scene/gui/box_container.h"
@@ -63,6 +64,12 @@ VBoxContainer *EditorResourceTooltipPlugin::make_default_tooltip(const String &p
 		vb->add_child(label);
 	}
 
+	ResourceUID::ID id = EditorFileSystem::get_singleton()->get_file_uid(p_resource_path);
+	if (id != ResourceUID::INVALID_ID) {
+		Label *label = memnew(Label(ResourceUID::get_singleton()->id_to_text(id)));
+		vb->add_child(label);
+	}
+
 	{
 		Ref<FileAccess> f = FileAccess::open(p_resource_path, FileAccess::READ);
 		Label *label = memnew(Label(vformat(TTR("Size: %s"), String::humanize_size(f->get_length()))));