Update Spectre Library UI

[Blitz54]

Description of the problem being solved:

Porting over Spectre library changes from PoB2.

• SpectreList.txt is not perfect for finding all possible spectres, and filtering ones already imported. For PoB2 it's easier to deal with as there is much less total spectres. But it's still very handy.
• Recommended spectres have not been set yet. I have a general idea of some that are popular, but would appreciate input.
• World areas matching to spectres are not 100% accurate. It's very close, but sometimes the world area does not show the monster varieties found within. The tooltip for the mob itself is the most accurate at the moment.
• Tooltip for world areas can get too tall for some locations.

After screenshot: