Relabel download/import, concept name
Added source types on a per MapSet basis
Missing closing li tag
Modal for setting available source type columns

Restore table order broken a few commits ago
Allow re-order of source types
Able to add new source types in modal
Made source modal cancel restore previous columns
Fix Source Columns button on navbar
Copy resizer glyph, make new cols work correctly dynamically
Placeholder text in new-row textarea on source type row add
Add description field to table
Expand downloadable source mapping to include descriptions and metadata
Fix index bug with source types