Make finite field element constructor accept lists for prime fields too

[slel]

Suggested by

• Ask Sage question 56465: Prime field element constructor does not accept lists of size one

CC: @DaveWitteMorris @slel

Component: finite rings

Issue created by migration from https://trac.sagemath.org/ticket/31606

[mkoeppe]

comment:1

Sage development has entered the release candidate phase for 9.3. Setting a new milestone for this ticket based on a cursory review.