**Acceptance Criteria:**
* When the user clicks on any part of the "extract" button for the first time, a dropdown should appear where they can:
** Select between the Tesseract and Wikimedia OCR tool
* After they have selected their default selection, the following behavior will occur:
** The user can click "extract" and the OCR rendering will occur with their default OCR engine
** The user can change the OCR engine by clicking on the down arrow icon
* In the dropdown, display a final option entitled "Advanced options," which:
** Links to the wmcloud OCR form (which would be useful for advanced users)
** Ideally, pre-populate the link to the Commons image in the form page
Idea: Maybe we give option to communities to select default, but all users can choose to switch to another one in the proofread page if they want (or in bulk, if/when that is available).