Fix mouse filter on visual shader node previews

editor/plugins/visual_shader_editor_plugin.cpp

@@ -8193,6 +8193,7 @@ void VisualShaderNodePortPreview::setup(const Ref<VisualShader> &p_shader, Ref<S
 		add_child(checkerboard);
 	}
 
+	set_mouse_filter(MOUSE_FILTER_PASS);
 	shader = p_shader;
 	shader->connect_changed(callable_mp(this, &VisualShaderNodePortPreview::_shader_changed), CONNECT_DEFERRED);
 	preview_mat = p_preview_material;