... in many places where the function call will later need to be between
modules (or libraries, or the executable) and the annotation will be a necessity
to keep the linkage working on Windows.
That's all that this sweeping commit does.
... This only cuts and pastes some functions from FileNames to another new file
and namespace, and changes namespace qualifiers where they are called.
The cycle resulted because of the need to include widgets/ErrorDialog.h
