KOD-153 + 168 Domain status and sorting

*KOD-153 : Status by domain not url*

- [x] Create new status field to domain
   - Create field
   - Fill in status
   - Remove status from urls
- [x] Migrate all domain statuses from urls
- [x] Remove logic for setting all the domain urls as...
- [x] Skip crawling domains marked as OK
- [x] Edit domain status by buttons

*KOD-168 : Sort order domains*

Order by number of links
 - [x] Add links field
 - [x] Populate current domains
Group by domain instead of domain
 - [x] Change cron to base on domains
 - [x] Join all current domains