Added Exporter: Added list exporter for all or selected channel lists to single/separate JSON/plaintext files.

Importer: Added Framedrop category for plaintext/JSON to single/multiple lists.

List Rename/Delete: Added Rename/Delete sections.

Block buttons are now pressable .

Fixed blocking recommendation videos which broke just 2 weeks after release.
Added drag and drop to importer.
Improved blocklists