Morpho

The problem is with the defining a citaion as report. According to EML, none of
the report tags are required. And the way DPW is designed, it cannot have maps
with empty values in it. And in eml, if title and creator tags are there but
there is no book, article or report tags, it would be invalid eml.

So these are the options to fix this:

1. Make publisher and report number as required fields in Morpho - even though
these are not required in EML

2. Remove Report option from this screen.

3. Modify the code to produce eml which has empty tags in it. THis will take
longer time as this will effect the tree editor also.

I think option #1 is the best. If anyone thinks that would be wrong, then plz
let me know. Otherwise I will fix this using option #1.

Fixed using option 1.

Also fixed another bug. To reproduce that bug, in the old code - add a citation
then click on add button, give title and creator information and hit ok. An
exception is generated because citationType is not null when any new citation
is added. citationType should be null if no citation has been selected.

Original Bugzilla ID was 1710