ProjectExplorer: 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: I1d05d48b23f44e3d589cc2a790803714786b57d2
Reviewed-by: Christian Kandeler <christian.kandeler@theqtcompany.com>
Reviewed-by: hjk <hjk@theqtcompany.com>

src/plugins/projectexplorer/projectnodes.cpp

@@ -185,7 +185,7 @@ bool Node::isEnabled() const
 QList<ProjectAction> Node::supportedActions(Node *node) const
 {
     QList<ProjectAction> list = parentFolderNode()->supportedActions(node);
-    list.append(ProjectExplorer::InheritedFromParent);
+    list.append(InheritedFromParent);
     return list;
 }