fixed issues on show/edit pages 

related to task: 1878
This is a somewhat minor issue but still worth pointing out: If you use `f.label :record_creator`, you create a label with the right text ("Record Creator"), but it will also have a `for="citation_record_creator"` attribute on it.  But in this case, there is no element with id `citation_record_creator`, and so an HTML validator will generate an error.  (More importantly, a screen reader used by visually-impaired users may get confused.)  So we can use a label element to get a consistent look-and-feel for the page, but in this case we should leave off the "for" attribute.  I couldn't figure out how to do this with a Rails form helper, so you may just have to use raw HTML:
```
<label>Record Creator</label>
```
Similarly for the other edit forms.