enable wordWrap on lblQRCode / small code comment change

src/qt/forms/qrcodedialog.ui

@@ -34,6 +34,9 @@
      <property name="alignment">
       <set>Qt::AlignCenter</set>
      </property>
+     <property name="wordWrap">
+      <bool>true</bool>
+     </property>
     </widget>
    </item>
    <item>

src/qt/qrcodedialog.cpp

@@ -89,7 +89,7 @@ QString QRCodeDialog::getURI()
         paramCount++;
     }
 
-    // limit URI length to 255 chars, to prevent a DoS of the QR-Code dialog
+    // limit URI length to 255 chars, to prevent a DoS against the QR-Code dialog
     if (ret.length() < 256)
         return ret;
     else