OverlayContainer, if the backing BooleanPreference has a value of true. If the "Do not show again" checkbox is selected when the overlay is dismissed the value of the preference is changed to false, meaning that this message will not be shown in the future. This is a asynchronous call.
@param container the OverlayContainer in which to display the message
@return true if the dialog was displayed
@since 3.0.0
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