Added ability to hide qr code entirely when printing

Resolves #231

client/src/pages/printing/printing.tsx

@@ -19,8 +19,8 @@ export interface PrintSettings {
 
 export interface QRCodePrintSettings {
   showContent?: boolean;
+  showQRCodeMode?: "no" | "simple" | "withIcon";
   textSize?: number;
-  showSpoolmanIcon?: boolean;
   printSettings: PrintSettings;
 }