Debugger: Make map item display more compact

This adds more information to the top-level item
in map and hash entries.

Change-Id: Id43689fd0b968142ff2e9d06c58687a92b5b17c7
Reviewed-by: David Schulz <david.schulz@qt.io>

src/plugins/debugger/watchdata.cpp

@@ -518,6 +518,7 @@ void WatchItem::parseHelper(const GdbMi &input, bool maySort)
                 QString key = subinput["key"].data();
                 if (!key.isEmpty())
                     child->name = decodeData(key, subinput["keyencoded"].data());
+                child->name = subinput["keyprefix"].data() + child->name;
                 child->parseHelper(subinput, maySort);
                 appendChild(child);
             }