sage -upgrade should complain when queues are used and patches are applied

[jasongrout]

I've messed up at least one upgrade by accidentally having mercurial queue patches applied when trying to upgrade. sage -upgrade should at least warn the user, and maybe give an option of popping off all of the patches before upgrading or just quitting.

CC: @sagetrac-jthurber

Component: build

Reviewer: Jeroen Demeyer

Issue created by migration from https://trac.sagemath.org/ticket/4833

[robertwb]

comment:1

See also #4759

[jdemeyer]

Reviewer: Jeroen Demeyer

[jdemeyer]

comment:4

Obsolete because of git