UI update

[jbhaywood]

• Changed default values for character skills to zero so that you don't have to manually zero out skills the character doesn't have.
• Changed attribute defaults to zero for consistency.
• Updated UI elements for skills and rolls to left align and gave them more padding to make reading them easier.

Note: I'm not sure if the "roll" value for skills and attributes also needs to be set to zero along with "value". Seems to work without doing that, but idk.

[Gerdofal]

Roll value is re-calculated every time the sheet is opened, so you don't need to worry about setting it. :)