* This narrowing constructor was causing a problem with a `clamp()` overload in the next commit.
* Believe this is a product of a by-gone time before we had the `XY()` method on `TVector3<T>` objects.
Fixes:
* do not strip 'filter' as a directory prefix.
* proper spacing for scaled sheet fonts.
* fix of transparent color in BMF fonts.
* fix restart button on error pane in Windows.
* do not skip over empty 'if's with a condition that would error out.
