Give the various comic book file formats distinct mime types so that they can be handled correctly by the preview functionality without file type checking at that point.

resources/config/mimetypemapping.dist.json

@@ -21,12 +21,12 @@
 	"bmp": ["image/bmp"],
 	"bpg": ["image/bpg"],
 	"bz2": ["application/x-bzip2"],
-	"cb7": ["application/x-cbr"],
-	"cba": ["application/x-cbr"],
-	"cbr": ["application/x-cbr"],
-	"cbt": ["application/x-cbr"],
-	"cbtc": ["application/x-cbr"],
-	"cbz": ["application/x-cbr"],
+	"cb7": ["application/comicbook+7z"],
+	"cba": ["application/comicbook+ace"],
+	"cbr": ["application/comicbook+rar"],
+	"cbt": ["application/comicbook+tar"],
+	"cbtc": ["application/comicbook+truecrypt"],
+	"cbz": ["application/comicbook+zip"],
 	"cc": ["text/x-c"],
 	"cdr": ["application/coreldraw"],
 	"class": ["application/java"],