Small improvement in German translation

Change-Id: I0870160ef7c88658f4b6c993d196a061e23a8c7a
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>

share/qtcreator/translations/qtcreator_de.ts

@@ -35464,7 +35464,8 @@ Kurznamen können verwendet werden, sofern sie eindeutig sind.</translation>
     </message>
     <message>
         <source>Mixed</source>
-        <translation>Gemischt</translation>
+        <translatorcomment>Using the English original because this is what will be passed to git (--mixed).</translatorcomment>
+        <translation>Mixed</translation>
     </message>
     <message>
         <source>Hard</source>