Identify one more MIME type as "cbr" in order to deal with it as it's expected

FIXED: [ 423877 ] cbr files are not opened with a cbr reader (Okular, for example)
BUG: 423877

Revision: !20

krArc/krarcbasemanager.cpp

@@ -263,6 +263,10 @@ QString KrArcBaseManager::getShortTypeFromMime(const QString &mime)
     if (mime == "application/x-rar-compressed" || mime == "application/vnd.rar")
         return "rar";
 
+    // If it's a cbr file but its mimetype isn't "application/x-cbr"
+    if (mime == "application/vnd.comicbook-rar")
+        return "cbr";
+
     // The short type that will be returned
     QString sType = mime;