Implement CSharpFormattingOptions UI

[dgrunwald]

We need UI to configure the CSharpFormattingOptions used by C# refactorings, the formatter, and the indentation engine.

Ideally, this would include support for "policies" -- that is, specify these options on solution/project/file level, with unset options being inherited from the level above.

[Rpinski]

Is available and working with possible option set on global/solution/project levels (each with inheritance from parent level).
Missing at the moment: Localization of textual representation of all formatting options.

Please create separate issues, if you find bugs.