Implement feedback request

[viviant100]

(a) Front Page

• [x] Footer: verify its consistency (Portal)
• [ ] Improve a workflow image that describes the tool (AppSci)
• [x] EarthData signup link:
  • both a login and create new account button would take the end user to the same Earthdata Login page

(b) Selection Page

• [x] Use bread crumbs (instead of tab) for selection

[jbyrne6]

• A footer is there but more work needs to be done to make it look like the standard PO.DAAC footer
• will work with AppSci team on workflow image in the same ticket as adding to the About page
• I think there should only be one button for the EarthData login/sign up since it directs to the same EarthData Login page
• bread crumbs are not implemented yet. Will be started next sprint