Auto-sort doesn't put .esl and .esm files before .esp files.

[cyberrumor]

The sort command should be made aware that .esl and .esm files will always load before .esp files. This isn't catastrophic, as the game will overwrite Plugins.txt with the correct load order.

Several features could be made aware of this requirement:

• move plugin x y should refuse to move .esl and .esm files after .esp files, and refuse to move .esp files before other types.
• activate mod x should add .esl and .esm files to the end of the other .esl and .esm files, not after .esp files.
• ~sort should put .esl and .esm files before .esp files, while still respecting order of the mods that provide those plugins.~

[cyberrumor]

Closing this as the sorting issue is fixed for sort, and I don't want to put up annoying rails on the move command.