added april fools warning

[Saahilverma19]

[ImprovedTube]

hi and thanks! @Saahilverma19

instead of running for everybody, everything depends a toggle, ImprovedTube.storage

(even if of course efficient code could be worth enabling that toggle by default, even for a feature applying only to some videos, with further universal consideration, such as excluding the april 1,2,3, since the average person will be aware right then.)

[ImprovedTube]

if ( toggle is enabled 
    OR (date is March30th-April20th 
           AND (user is tired AND OR (not watching comedy / pranks OR watching educational OR professional videos))
           )
)