Resolve "Static QR-Code preparations, SP = 5"

For testing base64EncodedString: eyJzdHIiOiJzdHJpbmciLCJudW0iOjEyMywiYm9vbCI6dHJ1ZSwiYXJyIjpbMSwiMiIsZmFsc2VdLCJvYmoiOnsibmVzdGVkIjoidmFsdWUifX0=

simply add to URL, for example: https://localhost:420XX/data?d=eyJzdHIiOiJzdHJpbmciLCJudW0iOjEyMywiYm9vbCI6dHJ1ZSwiYXJyIjpbMSwiMiIsZmFsc2VdLCJvYmoiOnsibmVzdGVkIjoidmFsdWUifX0=

Closes #1128 (closed)