Move alternate facing images for Isometric tokens onto token

[Phergus]

Is your feature request related to a problem? Please describe. Currently to have individual facing images for N, S, E, & W the user must create a separate table for each token (or token type) that contains the facing images. This means that when you save a token out, you also must save the table to be able to use it in a different campaign. Coordinating this is awkward at best.

Describe the solution you'd like Add facing images directly to the token via the Edit Token dialog and make them a part of the .rptok file when save out.

Describe alternatives you've considered The table method works but is clumsy and inconvenient.

Additional context Request on Discord by @acetrainer