Fix checkin/out pages, add location refresh, and misc bugfix

inventory/pages/add_page.py

@@ -7,7 +7,7 @@ import rio
 import datetime
 from mac_vendor_lookup import AsyncMacLookup, MacLookup
 mac = MacLookup()
-print("Updating vendors...")
+print("Updating MAC vendors...")
 try:
     mac.update_vendors()
     print("Update complete!")