Cleaning up some styles, fixing stuff I broke

* Removing dead style code
* Fixing up the curved arrow url
* Formatting
Update application_assessment.html

Added empty row
Update application_contacts.html

added empty row
Update migration_planning.md
Update learn.md
Update learn.md
Update migration_drivers.md
Update migration_drivers.md
Update migration_drivers.md
Update migration_drivers.md
Update discover.md
Update discover.md
Update discover.md
Update discover.md
Update migration_planning.md
Update general.md
Update general.md
Update eap4x.md
Update eap5x.md
Update introduction.md