result in only those files matching the pattern being displayed.
The wildcard may be a specification for multiple types of file with a description
for each, such as:
+ @code
"BMP and GIF files (*.bmp;*.gif)|*.bmp;*.gif|PNG files (*.png)|*.png"
+ @endcode
It must be noted that wildcard support in the native Motif file dialog is quite
limited: only one alternative is supported, and it is displayed without the
descriptive test; "BMP files (*.bmp)|*.bmp" is displayed as "*.bmp", and both