Fix semantic highlighting of constructor declarations

[eric-milles]

Consider the following:

class Example {
  Example() {}
  Example(arg) {}
  Example(... args) {}
  void meth() {}
}

The 3 constructor declarations should have their names colored the same as "meth". Currently the constructor names are colored in the editor the same as the parens and braces.

Note: In this case, "Example" is longer than "<init>", which is the internal name of the method node.