QmlDesigner: Remove unneeded qualifications

Mostly done using the following ruby script:
Dir.glob('**/*.cpp').each { |file|
  next if file =~ %r{src/shared/qbs|/qmljs/}
  s = File.read(file)
  s.scan(/^using namespace (.*);$/) {
    ns = $1
    t = s.gsub(/^(.*)\b#{ns}::((?!Const)[A-Z])/) { |m|
      before = $1
      char = $2
      if before =~ /"|\/\/|\\|using|SIGNAL|SLOT|Q_/
        m
      else
        before + char
      end
    }
    if t != s
      puts file
      File.open(file, 'w').write(t)
    end
  }
}

Change-Id: I492792bb9e5655c55795e938031efc557c9a462f
Reviewed-by: Thomas Hartmann <Thomas.Hartmann@digia.com>

src/libs/qmljs/qmljsvalueowner.cpp

@@ -65,12 +65,10 @@ private:
     }
 };
 
-} // end of Internal namespace
-} // end of QmlJS namespace
-
+} // namespace Internal
 
 // globally shared data
-class QmlJS::SharedValueOwner : public ValueOwner
+class SharedValueOwner : public ValueOwner
 {
 public:
     enum SharedValueOwnerKind{
@@ -969,3 +967,5 @@ const Value *ValueOwner::defaultValueForBuiltinType(const QString &name) const
     }
     return undefinedValue();
 }
+
+} // namespace QmlJS