Some widgets don't have an option to disable mouseover popup windows

[gvlasov]

Same as #352

For me personally, the calendar widget needs the popups disabled, but it is probably a good idea to add the option for all the other widgets as well.

[lcpz]

For me personally, the calendar widget needs the popups disabled

What's the point in having it, then? If you meant hovering popup, then see #320.

I added notify option to IMAP widget. Please list these other "some" widgets you are referring to.