Emitted after #WebKitWebView::ready-to-show on the newly
created #WebKitWebView when JavaScript code calls
<function>window.showModalDialog</function>. The purpose of
this signal is to allow the client application to prepare the
new view to behave as modal. Once the signal is emitted a new
main loop will be run to block user interaction in the parent
#WebKitWebView until the new dialog is closed.
Emitted after #WebKitWebView::ready-to-show on the newly created #WebKitWebView when JavaScript code calls <function>window.showModalDialog</function>. The purpose of this signal is to allow the client application to prepare the new view to behave as modal. Once the signal is emitted a new main loop will be run to block user interaction in the parent #WebKitWebView until the new dialog is closed.