feat(canary-web-components): add the ability to backspace through a d…

…ate input to delete the date

Add the ability to backspace through a date input to delete the date, using moveToPreviousInput
after the last character has been deleted

. #2244

packages/canary-web-components/src/components/ic-date-input/ic-date-input.tsx

@@ -600,6 +600,12 @@ export class DateInput {
         this.preventAutoFormatting = true;
         this.handleUpDownArrowKeyPress(input, event);
         break;
+      case "backspace":
+        if (input.value.length === 0) {
+          event.preventDefault();
+          this.moveToPreviousInput(input);
+        }
+        break;
       default:
         break;
     }