Use $foo.msg( 'bar' ) rather than $foo.html( mw.message( 'bar' ).parse() )

Use $foo.msg( 'bar' ) rather than $foo.html( mw.message( 'bar' ).parse() )

This is a rarely used, but well-documented and convenient feature of
jqueryMsg. (Rarely used in core, at least, I only found one use in
'mediawiki.action.edit.preview'; UploadWizard uses it all over).

Usages found with: \.(append|html)\(\s*mw\.(message)

Change-Id: Id555ba0d23b63dfaf46a401f88b70ded9c6c3bc4