fixed pubRev command's read-only mode handling for new tiddlers
fixed pubRev command's read-only mode handling for new tiddlers

As neither bag nor recipe are immediately available for newly created
tiddlers, we have to assume such tiddlers start out as private.

TiddlySpace/tiddlyspace,TiddlySpace/tiddlyspace,FND/tiddlyspace,FND/tiddlyspace,TiddlySpace/tiddlyspace,FND/tiddlyspace