DIalogue to set playbast render file type for playback

In addition to the proposal for a suffix/sub folder for playblasts, a dialogue to set the file-type for playblast would fix an issue whereby if you set the main render as multi-layer EXR, the playback of a playblast cannot be reviewed using 'view animation' in the render menu - I would love to see a minor overhaul of the playblast section as it is so, so, so useful when running animation tests and effective animation workkflows (particularly on heavy scenes with long remder times, like the crazy geo-node simulation I am working on at the oment!)