Issue 6851091: Disallow uploading patches to closed issues

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	Issue
u :	up to list of issues
m :	publish + mail comments
j / k :	jump to patch after / before current patch
o / <Enter> :	open current patch in side-by-side view
i :	open current patch in unified diff view

	Issue List
j / k :	jump to issue after / before current issue
o / <Enter> :	open current issue
# :	close issue

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<Ctrl> + s or <Ctrl> + Enter :	save comment
<Esc> :	cancel edit