win: Add the "Media" menu to the menubar

This is an alternative way to mount images to the virtual drives, as many people found the current behavior confusing.

src/win/86Box.rc

@@ -915,6 +915,7 @@ BEGIN
     IDS_2123	"Unable to initialize Ghostscript, gsdll32.dll is required for automatic convertion of PostScript files to PDF.\n\nAny documents sent to the generic PostScript printer will be saved as PostScript files (.ps)."
     IDS_2124	"MO %i (%03i): %ls"
     IDS_2125	"MO images (*.IM?)\0*.IM?\0All files (*.*)\0*.*\0"
+    IDS_2126	"&Media"
 END
 
 STRINGTABLE DISCARDABLE