Automatically disable encounters if JSON is missing

include/mainwindow.h

@@ -418,6 +418,7 @@ private:
     void initShortcuts();
     void initExtraShortcuts();
     void setProjectSpecificUIVisibility();
+    void setWildEncountersUIEnabled(bool enabled);
     void loadUserSettings();
     void applyMapListFilter(QString filterText);
     void restoreWindowState();

include/project.h

@@ -244,6 +244,7 @@ signals:
     void reloadProject();
     void uncheckMonitorFilesAction();
     void mapCacheCleared();
+    void disableWildEncountersUI();
 };
 
 #endif // PROJECT_H