fix: Uncaught TypeError: Cannot read properties of null (reading 'que…

…rySelector') in xdialog.startSpin() #3

Release version v3.4.1

vertical scrollbar appears in xdialog.info() when used with bootstrap…

… css

Update issue templates

fix demo #1 width

adjust UI

update version

update main page

demo2: show spin when loading iframe

add links