When changing the page size of the feedback list, always start from the first page

[markkuriekkinen]

When the user changes the page size in the feedback list (filter feedback form results), the page URL query parameter should be removed or set to page=1. If the user is currently on the last page, then increasing the page size will cause the 404 not found error because there are less pages in total when each page contains more list items. Returning to the first page makes sense when the user changes the page size.

I think it would be enough to just remove the page query parameter here:

mooc-jutut/feedback/static/pagination.js

Line 6 in 14dcc65

params.set('paginate_by', $(this).val());

(Currently, it does not touch the page parameter. paginate_by is the size of the page, while page defines which page is opened.)