do not show full window image preview when right mouse button is used

                    e.style.cursor='pointer'

                    e.style.userSelect='none'

                    e.addEventListener('mousedown', function (evt) {

                        if(!opts.js_modal_lightbox) return;

                        if(!opts.js_modal_lightbox || evt.button != 0) return;

                        modalZoomSet(gradioApp().getElementById('modalImage'), opts.js_modal_lightbox_initially_zoomed)

                        showModal(evt)

                    }, true);