Allow to close Perspective Grid widget with any tool active, not only with Perspective Tools
MANY users don’t know how to disable Perspective Grid.
They don’t know about the View > Perspective Grid > Hide Grid menu command, and don’t even try to search for it, because they think that little 'x' is the only way to hide it...
...but that button only works when you have Perspective Grid Tool or Perspective Selection Tool picked, and does nothing when you have some other tool chosen.
The button never looks deactivated and lie to us about being clickable.
This modality makes zero sense.
Please allow to click it any time with any tool.

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Margaret Trauth commented
This one's still hilariously annoying and still there in 29.3.
The only reason I'm not regularly swearing at this is because I went into Keyboard Shortcuts and removed the shortcut for the Perspective tool so I would never invoke the **** thing again. I've been using this program as my main art tool for *twenty five years* and turning this stupid widget off was a giant pain ********** for multiple years until I finally nuked the shortcut.
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noirman commented
allow the tool to be disabled once enabled in a document. otherwise it is a virus.