Don't do HTML formatting when exporting a TSV

This patch avoids applying HTML formatting when the priority name is printed as part of a TSV export.
Merge remote-tracking branch 'github/pr/2'
return the localized priority to Results.tsv
Merge remote-tracking branch 'github/pr/3'
Merge remote-tracking branch 'upstream/master'

Conflicts:
	html/Callbacks/PriorityAsString/Elements/RT__Ticket/ColumnMap/Once