Specifies the width of a metadata field caption, in percent.
Returns the width of the current metadata field caption in percent.
Used as script:
<$if isInfo$> <$captionFieldWidth="30%"$> <$captionEntryWidth="70%"$> <$elseif isEditMode$> <$captionFieldWidth="20%"$> <$captionEntryWidth="80%"$> <$endif$>