Split CLI processing into pre- and post-detection functions and add --localconfig and --nodetect options

SettingsManager.cpp

@@ -51,6 +51,11 @@ void SettingsManager::SetSettings(std::string settings_key, json new_settings)
 
 void SettingsManager::LoadSettings(std::string filename)
 {
+    /*---------------------------------------------------------*\
+    | Clear any stored settings before loading                  |
+    \*---------------------------------------------------------*/
+    settings_data.clear();
+
     /*---------------------------------------------------------*\
     | Store settings filename, so we can save to it later       |
     \*---------------------------------------------------------*/
@@ -101,4 +106,4 @@ void SettingsManager::SaveSettings()
 
         settings_file.close();
     }
-}
+}