Various improvements for usability and consistency and inclusion of PWA handling.

include/app.h

@@ -158,10 +158,13 @@ void handleApisGet();
 void handleApisPost();
 void handleSettingsGet();
 void handleSettingsPost();
+void handleNetworkSettingsGet();
+void handleNetworkSettingsPost();
 void handleLogsGet();
 void handleLogsClear();
 void handleFilesList();
 void handleFileDownload();
+void handleRestart();
 void handleFactoryReset();
 void handleConfigExport();
 void handleConfigImport();

include/custom_api.h

@@ -1,5 +1,6 @@
 #pragma once
 
+void handleAppInfo();
 void handlePing();
 void handleAdd();
 void handleLed();