Fix annotation input focus trap regression in Safari

`setSelectionRange(0, 0)` added in mozilla@44b24fc for mozilla#12359, required only by Firefox ([bug](https://bugzilla.mozilla.org/show_bug.cgi?id=860329)), causes issues mozilla#13191, mozilla#12592 in Safari.
`scrollLeft = 0` is a fix that breaks the focus trap in Safari while **keeping Firefox behavior same for mozilla#12359**.

src/display/annotation_layer.js

@@ -668,7 +668,8 @@ class TextWidgetAnnotationElement extends WidgetAnnotationElement {
         if (elementData.formattedValue) {
           event.target.value = elementData.formattedValue;
         }
-        event.target.setSelectionRange(0, 0);
+        // Reset the cursor position to the start of the field (issue 12359).
+        event.target.scrollLeft = 0;
         elementData.beforeInputSelectionRange = null;
       };