CDB-683 #resolve [importer] Implement append mode
append data option enabled
conflict solved
append data added
fixed styles and interactions for append data
CDB-683 #comment Populate DataImport#table_id if not passed for append mode
Update with latest changes from release/2.6.0 branch
Merge branch 'release/2.6.0' into feature/CDB-683
Added publicuser password to db conection
Fixed privileges problem when creating tables
Merge remote-tracking branch 'origin/fix/CDB-965' into release/2.6.0

Conflicts:
	app/models/table.rb
CDB-683 #resolve Implement append mode
Merge remote-tracking branch 'origin/feature/CDB-683' into release/2.6.0