Remove limit of assignments in select dialog
Remove limit of assignments in select dialog

fixes LS-1633
flag=none

test plan:
- Create a course with over 200 assignments
- Add all of those assignments to an assignment group
- Open the dialog to add assignments to a module in the course
- See that all assignments are available in the list

Change-Id: Ie712e7b3f65e52d8cbfd2b0f3653833d07842480
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/258463
Tested-by: Service Cloud Jenkins <9144042a601061f88f1e1d7a1753ea3e2972119d@instructure.com>
Reviewed-by: Jonathan Guardado <94d0a13686225e6d8af5347ed17f9cc0c2643995@instructure.com>
Reviewed-by: Nate Armstrong <619b324efbf5f7848de055bdc8bef4c0dd7c8ef5@instructure.com>
QA-Review: Nate Armstrong <619b324efbf5f7848de055bdc8bef4c0dd7c8ef5@instructure.com>
Product-Review: Eric Saupe <e7287cf05ae62bc45889f17a9d34b8fae8d5afd1@instructure.com>

instructure/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,instructure/canvas-lms,instructure/canvas-lms