Fix bug in the Digit component (#660)

### Summary & Motivation

Fix bug in the Digit component that did not allow alphanumeric input
when it should have.

The issue was discovered on iOS, where user only could input numbers.

### Checklist

- [x] I have added a Label to the pull-request
- [x] I have added tests, and done manual regression tests
- [x] I have updated the documentation, if necessary

application/shared-webapp/ui/components/Digit.tsx

@@ -50,7 +50,7 @@ export function Digit({
       id={id}
       tabIndex={tabIndex}
       type="text"
-      inputMode="numeric"
+      inputMode={digitPattern === DigitPattern.Digits ? "numeric" : "text"}
       pattern={inputPattern}
       maxLength={1}
       value={value}