Use 'evaluateName' when evaluating variables

[HampusAdolfsson]

What it does

If available, use 'evaluateName' instead of 'name' for evaluatable expressions. As far as I could find, this is the only place where variable names are evaluated.

Closes #120.

How to test

Start any debugger that provides an evaluateName (such as cppdbg) and make sure the variables column displays ranges correctly.

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