ObjectDetail: Improve Readability of Custom Var Table

[flourish86]

I wonder if we could improve the custom variable table – especially for clearer recognizability of dictionary elements, clearer var type differentiation and better readability of large sets of custom vars.

I made an improved version.

Clarify types better (Number, Array, Number, String):

• indicate strings by wrapping in quotation marks
• Explicitly point out Dictionary (alternatively with the term "Dict")
• move array to the right column, analogous to "Dictionary"

Improve readability

increase indentation to .75em to improve readability