fixes #36: changed selector to div.h-full.mb-4.p-4
fixes #26: add button to parent element instead and look for presence on history back/forward
fixes #33: dialog is not cached anymore but recreated on every opening, menu entry presence is checked before creation
fixes #36: changed selector to
div.h-full.mb-4.p-4fixes #26: add button to parent element instead and look for presence on history back/forward fixes #33: dialog is not cached anymore but recreated on every opening, menu entry presence is checked before creation