Support line pragmas for find all references

[NTaylorMullen]

In Razor scenarios where you have a front level file such as

<!-- Counter.razor -->
<p>@MyType.Method()</p>

It generates virtual C# documents under the path Counter.razor__virtual.cs that looks like:

...
#line 456 "C:/path/to/Index.razor"
__o = MyType.Method();
#line default

When you do find all references on the corresponding C# MyType.Method member you get:

If find all references (FAR) respected line pragmas and then assumed column 0 (line pragmas don't give column info) this would work without having to actually read the Razor file 😄