Make method naming more consistent.

* Use id() for methods returning a string used to represent
    some type of object.
  * Use displayName() for strings that are meant to be user
    visible.
  * Quieten some warnings while touching the files anyway.
  * Move Factories to their products in the plugins where that
    was not done before.

Reviewed-by: dt

src/plugins/cppeditor/cppfilewizard.cpp

@@ -60,7 +60,7 @@ Core::GeneratedFiles CppFileWizard::generateFilesFromPath(const QString &path,
     const QString fileName = Core::BaseFileWizard::buildFileName(path, name, preferredSuffix(mimeType));
 
     Core::GeneratedFile file(fileName);
-    file.setEditorKind(QLatin1String(Constants::C_CPPEDITOR));
+    file.setEditorId(QLatin1String(Constants::CPPEDITOR_ID));
     file.setContents(fileContents(m_type, fileName));
 
     return Core::GeneratedFiles() << file;