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/qmakeprojectmanager/qmakenodes.cpp

@@ -183,6 +183,7 @@ using namespace QmakeProjectManager::Internal;
 QmakePriFile::QmakePriFile(QmakeProjectManager::QmakePriFileNode *qmakePriFile)
     : IDocument(qmakePriFile), m_priFile(qmakePriFile)
 {
+    setId("Qmake.PriFile");
     setFilePath(m_priFile->path());
 }