Misc: 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: I919da493d0629b719d328e5e71c96a29d230dfd1
Reviewed-by: Christian Kandeler <christian.kandeler@theqtcompany.com>
Reviewed-by: hjk <hjk@theqtcompany.com>

src/plugins/autotoolsprojectmanager/autotoolsprojectnode.cpp

@@ -51,10 +51,10 @@ bool AutotoolsProjectNode::showInSimpleTree() const
     return true;
 }
 
-QList<ProjectExplorer::ProjectAction> AutotoolsProjectNode::supportedActions(Node *node) const
+QList<ProjectAction> AutotoolsProjectNode::supportedActions(Node *node) const
 {
     Q_UNUSED(node);
-    return QList<ProjectExplorer::ProjectAction>();
+    return QList<ProjectAction>();
 }
 
 bool AutotoolsProjectNode::canAddSubProject(const QString &proFilePath) const