BC: UpperCamelCase enum names

[jkowalleck]

the enum classes became native enums via #140

This means we dont have consts, but cases.
Constants were written in uppercase in the past, which originates to times when here when no IDEs, so people would easily know these were constants not properties ....

this is outdated foo.

Let's rename the cases and user UpperCamelCase for naming conventions.
And while on it, sort them alphabetically.