Fix EvEditor responding to valid direction commands in the current location

[chiizujin]

Brief overview of PR changes/additions

If an exit's direction command exists in your current location, then EvEditor will treat matching input as those commands and move you around the game.

This is fixed by using the same priority for EvEditorCmdSet as already exists for SaveYesNoCmdSet (150).

Motivation for adding to Evennia

Bug fix.

Examples:

Before:

>desc/edit
----------Line Editor [desc]--------------------------------------------------
01| This is a room.
----------[l:01 w:004 c:0015]------------(:h for help)------------------------
>e
room2(#51)
This is a room.
Exits: west

After (in the same initial room):

>desc/edit
----------Line Editor [desc]--------------------------------------------------
01| This is a room.
----------[l:01 w:004 c:0015]------------(:h for help)------------------------
>e
02| e