Lossless toggle

Problem/Motivation

It would be really nice to have a toggle, which controls the lossless flag. Is it realistic?

Proposed resolution

Here ImagemagickEventSubscriber::preConvertExecute, where the concatenation of the cli command is built, we could bring in sth like that:$arguments->add(['-define', 'WEBP:lossless=false']);
Of course, this could be more intuitive, but i don't know where....