C4: Message::generate(true) not compatible with Core

[rabauss]

All Method-Calls of Message::generate(true) are not compatible with the Message-Class in the core of Contao 4.x (generate($strScope=TL_MODE)), so Messages won't be generated in the Backend - specially in the product list.

But at the moment I'm not sure, if it would be compatible with Contao 3.5, if we remove the true. What do you think?

[aschempp]

Fixed in Isotope 2.5.9, but should also be fixed in the next Contao version.
contao/contao#185