PDF renderer: Place hidden text inside page rect

src/pretix/base/pdf.py

@@ -777,16 +777,16 @@ class Renderer:
         qr_y = float(o['bottom']) * mm
         renderPDF.draw(d, canvas, qr_x, qr_y)
 
-        # Add QR content + PDF issuer as a hidden string (fully transparent & off page)
+        # Add QR content + PDF issuer as a hidden string (fully transparent & very very small)
         # This helps automated processing of the PDF file by 3rd parties, e.g. when checking tickets for resale
         data = {
             "issuer": settings.SITE_URL,
             o.get('content', 'secret'): content
         }
         canvas.saveState()
-        canvas.setFont('Open Sans', 1)
+        canvas.setFont('Open Sans', .01)
         canvas.setFillColorRGB(0, 0, 0, 0)
-        canvas.drawString(-1000 * mm, -1000 * mm, json.dumps(data, sort_keys=True))
+        canvas.drawString(0 * mm, 0 * mm, json.dumps(data, sort_keys=True))
         canvas.restoreState()
 
     def _get_ev(self, op, order):

src/pretix/control/templates/pretixcontrol/checkin/checkins.html

@@ -56,7 +56,7 @@
             </p>
         </div>
     {% else %}
-        <div class="table-responsive">
+        <span class="table-responsive">
             <table class="table table-hover table-quotas">
                 <thead>
                 <tr>