fix up a bunch of clang-tidy stuff

mostly changing references, which i hope doesnt break stuff with models (TreeRow, iterators) since they gave me some strange problems in the past

src/abaddon.hpp

@@ -14,14 +14,15 @@
 class Abaddon {
 private:
     Abaddon();
+
+public:
+    static Abaddon &Get();
+
     Abaddon(const Abaddon &) = delete;
     Abaddon &operator=(const Abaddon &) = delete;
     Abaddon(Abaddon &&) = delete;
     Abaddon &operator=(Abaddon &&) = delete;
 
-public:
-    static Abaddon &Get();
-
     int StartGTK();
     void OnShutdown();