Debugger: Better handling of the tabbed extra views

Closing with the [x] now resets the Display mode of the associated
iname, and the view hides if there are no visible tabs left.
Also, remove the long-unused DisplayProcess format.

Change-Id: Ibd3308549af75e345c672c07f6714d26e7196e5a
Reviewed-by: Christian Stenger <christian.stenger@digia.com>

src/plugins/debugger/debuggerprotocol.h

@@ -210,9 +210,8 @@ enum DebuggerDisplay {
     DisplayImageData                       = 1,
     DisplayUtf16String                     = 2,
     DisplayImageFile                       = 3,
-    DisplayProcess                         = 4,
-    DisplayLatin1String                    = 5,
-    DisplayUtf8String                      = 6
+    DisplayLatin1String                    = 4,
+    DisplayUtf8String                      = 5
 };
 // Decode string data as returned by the dumper helpers.
 QString decodeData(const QByteArray &baIn, int encoding);