QAT dropdown menu will show an "a" underlined for any options not already added to the toolbar, and an "r" underlined for options already on the toolbar (for those menu options that contain those letters). Pressing "a" when the dropdown is visible and open will add the first item containig an "a" to the toolbar and make it checked. Pressing "r" will remove the first item containing an "r" from the toolbar and uncheck it. Is there a way to control this behavior and disable it?