add button to share chat, add VDMDI tag, fixes

src/ViewModel/Global/coreViewModel.ts

@@ -153,6 +153,11 @@ export default class CoreViewModel {
         }, 500);
     };
 
+    // VDPR
+    openVDPR = (): void => {
+	window.open("https://vdpr.org/VDMDI/CT");
+    }
+
     // init
     constructor(
         public readonly storageModel: StorageModel,