Editors: Move id() from editor to document.

Change-Id: Ib81076842ab1c16832224790194b001206404d64
Reviewed-by: hjk <hjk121@nokiamail.com>
Reviewed-by: Eike Ziller <eike.ziller@digia.com>

src/plugins/qmlprojectmanager/qmlprojectfile.cpp

@@ -41,6 +41,7 @@ QmlProjectFile::QmlProjectFile(QmlProject *parent, QString fileName)
 {
     QTC_CHECK(m_project);
     QTC_CHECK(!fileName.isEmpty());
+    setId("Qml.ProjectFile");
     setFilePath(fileName);
 }