Default update_vital_only to true for Android and Web editor

Android devices will typically be powered from battery. This PR defaults the editor on Android to use `update_vital_only` mode, using as little power as possible, in order to conserve battery.
Also shows the update spinner by default, to emphasize that vital updates only is occurring, and allow easy switching out of the mode.

editor/editor_node.cpp

@@ -6044,9 +6044,14 @@ EditorNode::EditorNode() {
 	EDITOR_DEF("interface/editor/save_on_focus_loss", false);
 	EDITOR_DEF_RST("interface/editor/save_each_scene_on_quit", true);
 	EDITOR_DEF("interface/editor/quit_confirmation", true);
-	EDITOR_DEF("interface/editor/show_update_spinner", false);
 	EDITOR_DEF("interface/editor/update_continuously", false);
+#if defined(ANDROID_ENABLED) || defined(JAVASCRIPT_ENABLED)
+	EDITOR_DEF("interface/editor/show_update_spinner", true);
+	EDITOR_DEF("interface/editor/update_vital_only", true);
+#else
+	EDITOR_DEF("interface/editor/show_update_spinner", false);
 	EDITOR_DEF("interface/editor/update_vital_only", false);
+#endif
 	EDITOR_DEF("interface/editor/localize_settings", true);
 	EDITOR_DEF_RST("interface/scene_tabs/restore_scenes_on_load", false);
 	EDITOR_DEF_RST("interface/scene_tabs/show_thumbnail_on_hover", true);