Tons of spelling fixes (#5413)

[ci skip]

src/openrct2/object/ObjectManager.cpp

@@ -418,7 +418,7 @@ private:
                 }
             }
 
-            // HACK Scenery window will lose its tabs after changing the the scenery group indexing
+            // HACK Scenery window will lose its tabs after changing the scenery group indexing
             //      for now just close it, but it will be better to later tell it to invalidate the tabs
             window_close_by_class(WC_SCENERY);
         }