Fixed bug where z ordering was not parsing correctly in the layer name

[advra]

Specific case Z layer ordering is a key feature with art engine but is currently broken. Users defining a layer such as "z-10,Cozy Jacket" should evaluate that "Cozy Jacket" would move the item to z index -10 despite its parents structure. The offending method is parseZIndex within src/main.js which attempts to extract and parse an in value with z# Ex. Although "z10," is valid it is fed into theparseInt with z still prepended such as z10 rather than 10.

The function will always evaluate to null. This fix allows for the 3 possible cases below as described in the docs:

Case 1: User defines no override for Cozy Jacket which uses default value from config.js layerConfigurations[] Directory Input:

- Clothing
    - Cozy Jacket

Output:

• Name: Cozy Jacket
• Z Order: NULL (no override. default value used instead)

Case 2: User defines override for Cozy Jacket at -10 Directory Input:

- Clothing
    - z-10,Cozy Jacket

Output:

• Name: Cozy Jacket
• Z Order: -10

Case 3: User defines override for Cozy Jacket at 10 Directory Input:

- Clothing
    - z10,Cozy Jacket

Output:

• Name: Cozy Jacket
• Z Order: 10

[advra]

Could not reproduce. Closing for now.