Fix module titling problems

[kathi-fletcher]

In testing various fixes that Izak made, I realized that the metadata titling is not working right at all and I am a little worried that one of the things I merged might be at fault.

• If I create a new module, the title doesn't show up at all in the module.
• If I open an old module, the title in the nav is there, but in the module the title is "untitled".

We have this situation where the module metadata is now in the module and needs to be synchronized with the nav file. Since the nav file and the module both have a copy of the title part of the metadata, those have to be synchronized. Tom had this working at one point, but it has gotten wonked. Note that changes to the metadata in the -nav get saved automatically, and changes to the metadata in the module must be hand saved. The "Save all" button must light up when the title is changed using "rename" in the nav, or using the metadata diagog in the module.

[izak]

Ok, I think I found at least one issue. oerpub/bookish@0bc6531 hooked up an event handler to a title change, and before I fixed the problem where attributes were being set inside OpfFile::parse this would have fired, but it will no longer work. So this is the first problem.

I suspect the same issue with oerpub/bookish@9f69f22.

So this was indeed "broken" by ce6d259.