Is your feature request related to a problem? Please describe.
Normal dungeon level requirement is not an easy sorting order for people looking for a specific dungeon in the filter window. And almost always for Level 70s.

Describe the solution you'd like
On dungeons.lua line 482. I did this ordering for myself and works fine.
GBB.TbcDungeonNames = { "RAMPS", "BF", "SH", "SP", "UB", "SV", "MT", "CRYPTS", "SETH", "SL", "OHB", "BM", "MECH","BOT", "ARC", "MGT", "KARA", "GL", "MAG", "SSC", "EYE", "ZA", "HYJAL", "BT", "SWP", }

Additional context
If an individual heroic normal selecting feature is implemented, this might be unnecessary. But I still suggest this ordering for Heroic dungeons.