Add a property hint range to Auto Refresh Interval editor setting

This prevents using zero or negative values, which are invalid and
will cause various issues in the editor (such as the inspector never
updating until the editor is closed and reopened).

editor/editor_settings.cpp

@@ -531,7 +531,7 @@ void EditorSettings::_load_defaults(Ref<ConfigFile> p_extra_config) {
 	_initial_set("docks/filesystem/textfile_extensions", "txt,md,cfg,ini,log,json,yml,yaml,toml");
 
 	// Property editor
-	_initial_set("docks/property_editor/auto_refresh_interval", 0.2); //update 5 times per second by default
+	EDITOR_SETTING(Variant::FLOAT, PROPERTY_HINT_RANGE, "docks/property_editor/auto_refresh_interval", 0.2, "0.01,1,0.001"); // Update 5 times per second by default.
 	EDITOR_SETTING(Variant::FLOAT, PROPERTY_HINT_RANGE, "docks/property_editor/subresource_hue_tint", 0.75, "0,1,0.01")
 
 	/* Text editor */