Added event handlers for touchscreen support in keygen page (paint ca…

…nvas).

GlitchedPolygons.GlitchEd25519.BlazorWebApp/Pages/Keygen.razor

@@ -176,9 +176,15 @@
     }
     
     paintCanvas.addEventListener('mousedown', startDrawing);
+    paintCanvas.addEventListener('touchstart', startDrawing);
+    
     paintCanvas.addEventListener('mousemove', drawLine);
+    paintCanvas.addEventListener('touchmove', drawLine);
+    
     paintCanvas.addEventListener('mouseup', stopDrawing);
     paintCanvas.addEventListener('mouseout', stopDrawing);
+    paintCanvas.addEventListener('touchend', stopDrawing);
+    paintCanvas.addEventListener('touchcancel', stopDrawing);
     
     const copyPublicKeyButton = document.getElementById('copyPublicKeyButton');
     const defaultLabelCopyPublicKeyButton = copyPublicKeyButton.innerHTML;