[BUG] Unable to read UserGuide.lyx

[Jean-Marc Lasgouttes]

When reading UserGuide.lyx, I get

InsetFloat::Read:: Missing wide!
InsetCollapsable::Read: Missing collapsed!
InsetFloat::Read:: Missing wide!
InsetCollapsable::Read: Missing collapsed!
InsetFloat::Read:: Missing wide!
InsetCollapsable::Read: Missing collapsed!
IOT/Abort trap

Lars, this is probably a result of your recent changes to
InsetFloat... 

JMarc