Shoonya v3.1

1. Change access control for exporting project data to dataset, deleting project tasks and changing project stage.
2. Display appropriate error message when a patch request is sent to a duplicate annotation of task.
3. Display WER for payment report for all user roles.
4. Frontend changes for restricting the number of times a reviewer can send a task for revision to annotator.
5. Show a preview of 'annotator', 'reviewer' & 'superchecker' versions of annotations in the task edit page of Audio transcription project type.
6. Customize hotkey for selecting a text within a textbox in ANTE project type.
7. OCR Transcription changes.
8. Freezing all tasks created using a data item for which freeze_task field is set as true.
9. Making the platform responsive for all screen resolutions.
10. Add members to dataset instance.
11. Testing & fixing analytics endpoints and different frontend filters.
12. Enable checks to ensure only a single request is sent from the frontend when 'Pull New Data Items from Source Dataset' button in project settings is clicked.
13. Do not display deallocate tasks button for annotators, reviewers & supercheckers for OCR project types