Covariate and Species edit pages and Covariate show page need to be re-styled

[gsrohde]

• [x] Covariates and Species edit pages and covariates show page have no left-margin and are hard to read.
  • [x] Fix edit pages
  • [x] Fix covariate show page
• [x] "Show" button on species edit page returns one to the edit page; should return to view page for the species.
• [ ] Can delete most fields from species edit page (?) (approx. anything with CamelCase)