dmd: why not use fully qualified names for types in error messages?

[Timothee Cour via Digitalmars-d]

eg:
Error: no property 'IF_gray' for type 'ImageFormat'
=>
Error: no property 'IF_gray' for type 'foo.bar.ImageFormat'

and also, why not show where the symbol is defined?

would PR's for that be accepted? is that hard to implement?