Improve UX of signature pad

www/assets/js/noticeslip.js

@@ -12,7 +12,11 @@ function initSignaturePad() {
     var canvas = document.getElementById("signaturecanvas");
     resizeCanvas(canvas);
     signaturePad = new SignaturePad(canvas, {
-        backgroundColor: 'rgba(255, 255, 255, 0.5)'
+        backgroundColor: 'rgba(255, 255, 255, 0.5)',
+        onBegin: function () {
+            // stop page from jumping around if user starts drawing signature while a text box is focused
+            $("input").blur();
+        }
     });
 }
 
@@ -220,7 +224,6 @@ $("#app").on("click", "#signatureUndoBtn", function () {
         signaturePad.fromData(data);
     }
 });
-
 //$(window).on("resize", function () {
 //    if (signaturePad != null) {
 //        resizeCanvas(document.getElementById("signaturecanvas"));