Core: 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: I5c6690f51488bf8ca3610ba9fb11e6e5fd814aaa
Reviewed-by: Christian Kandeler <christian.kandeler@theqtcompany.com>
Reviewed-by: hjk <hjk@theqtcompany.com>

src/plugins/coreplugin/dialogs/newdialog.cpp

@@ -193,7 +193,7 @@ QString NewDialog::m_lastCategory = QString();
 
 NewDialog::NewDialog(QWidget *parent) :
     QDialog(parent),
-    m_ui(new Core::Internal::Ui::NewDialog),
+    m_ui(new Ui::NewDialog),
     m_okButton(0)
 {
     setWindowFlags(windowFlags() & ~Qt::WindowContextHelpButtonHint);