CMake: Semi-automatic cleanups

* Shorten header guards
* Use override and auto where possible
* Remove useless destructors, etc.
* Remove private slots sections, unify private: sections
* Use member initialization where it makes sense

Change-Id: I00eaf6d706adc16859176d1b68c631d3336bb39f
Reviewed-by: Tim Jenssen <tim.jenssen@theqtcompany.com>

src/plugins/cmakeprojectmanager/cmakeprojectnodes.h

@@ -28,8 +28,8 @@
 **
 ****************************************************************************/
 
-#ifndef CMAKEPROJECTNODE_H
-#define CMAKEPROJECTNODE_H
+#ifndef CMAKEPROJECTNODES_H
+#define CMAKEPROJECTNODES_H
 
 #include <projectexplorer/projectnodes.h>
 
@@ -49,4 +49,4 @@ public:
 } // namespace Internal
 } // namespace CMakeProjectManager
 
-#endif // CMAKEPROJECTNODE_H
+#endif // CMAKEPROJECTNODES_H