Feature request: add parts to basket to create new question

I often find myself wishing that I could copy individual question parts from distinct questions, and combine them to create a new question. E.g. copy parts b), c) from Question X and part d) from Question Y, and combine them into the new Question Z.

This could be done in a similar fashion to how exams are created by adding questions to the user's basket. An important difference would be the need to copy the question parts into a new question (in contrast to the exam functionality that attachs questions to exams, so that editing a question alters every exam it is attached to).

Start by examining the existing basket workflow used to create exams and the question-creation flow. Determine how selected parts from multiple questions can be copied into a new, independent question; done means the resulting question contains those parts without changing the originals.

Written by the indexing model from the issue text.