Update layout of Import/Export page and button names
Adjust layout and spacing on Appearance page
Make heading and contents of Actions column in Users table centered
Update styling of Dashboard
Update styling of Metadata page
Adjust Tags table columns to align numbers properly
Update Pages section heading and instructions wording
Add background highlighting on hover to make item panels feel more 'active'
Merge pull request #647 from sul-dlss/curation-form-cleanup

Styling and layout updates to Admin/Curation pages