Ref T103, Unified naming of directory functions

* some started with get/some not (removed get, get is normally used for our getters)
* some used swift, getSwiftXZY dir (removed swift)
* used full word "directory", not dir/directory mixed

src/blackgui/settings/viewdirectorysettings.h

@@ -31,7 +31,7 @@ namespace BlackGui
             static bool isValid(const QString &directory) { Q_UNUSED(directory); return true; }
 
             //! Default, not consolidating
-            static const QString &defaultValue() { return BlackMisc::CDirectoryUtils::getDocumentationDirectory(); }
+            static const QString &defaultValue() { return BlackMisc::CDirectoryUtils::documentationDirectory(); }
         };
     } // ns
 } // ns