246 sequence feature followup

#3161
- move sequence info to molecular_details widget /species/c_elegans/feature/WBsf034245#012345--10
- 'Sequence feature' as display name for feature class
- reorder class list in search by display name

#3267
Add features widget to CDS, Transposon, Transcripts, Feature, and Pseudogene

- CDS: 
/species/c_elegans/cds/C05C8.7#02--10
- Transcript:
/species/c_elegans/transcript/C05C8.7.1#053--10
- Transposon: I can't find an example
- Feature: /species/c_elegans/feature/WBsf039306#03--10
-Pseudogene: /species/c_elegans/pseudogene/Y53C10A.14#02--10

#3316 
column changes in the features table