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/plugins/qmljseditor/qmljsquickfixassist.cpp

@@ -48,7 +48,7 @@ using namespace Internal;
 // QuickFixAssistInterface
 // -----------------------
 QmlJSQuickFixAssistInterface::QmlJSQuickFixAssistInterface(QmlJSEditorWidget *editor,
-                                                           TextEditor::AssistReason reason)
+                                                           AssistReason reason)
     : AssistInterface(editor->document(), editor->position(),
                       editor->textDocument()->filePath().toString(), reason)
     , m_semanticInfo(editor->qmlJsEditorDocument()->semanticInfo())
@@ -94,7 +94,7 @@ IAssistProcessor *QmlJSQuickFixAssistProvider::createProcessor() const
 
 QList<QuickFixFactory *> QmlJSQuickFixAssistProvider::quickFixFactories() const
 {
-    QList<TextEditor::QuickFixFactory *> results;
+    QList<QuickFixFactory *> results;
     foreach (QmlJSQuickFixFactory *f, ExtensionSystem::PluginManager::getObjects<QmlJSQuickFixFactory>())
         results.append(f);
     return results;