New JSON config cleanup and testing

include/config.h

@@ -48,13 +48,7 @@ public:
     { };
     virtual ~KeyValueConfigBase() {};
 
-    // Writes the contents of the config to disk.
-    // Returns true if saving was successful, false otherwise.
     virtual bool save();
-
-    // Loads the contents of the config from disk.
-    // Returns true if saving was successful, false otherwise.
-    // A successful load includes initializing an empty or non-existing file.
     virtual bool load();
 
     virtual QJsonObject toJson();

include/ui/eventfilters.h

@@ -37,5 +37,5 @@ public:
     bool eventFilter(QObject *obj, QEvent *event) override;
 private:
     bool m_loggingEnabled = true;
-    QSet<QObject*> m_wasShown;
+    QSet<QObject*> m_shown;
 };

include/ui/projectsettingseditor.h

@@ -71,6 +71,7 @@ private:
     void addNewGlobalConstant();
     void addGlobalConstant(const QString &name, const QString &expression);
     QMap<QString,QString> getGlobalConstants();
+    BaseGame::Version getBaseGameVersion() const;
 
 private slots:
     void dialogButtonClicked(QAbstractButton *button);