Include the name for interactive form elements

We already rendered the name for radio buttons, but it was missing for
all other interactive form elements. This commit adds that so that
values entered in form elements can be read based on the element name.

src/display/annotation_layer.js

@@ -456,6 +456,7 @@ class TextWidgetAnnotationElement extends WidgetAnnotationElement {
       }
 
       element.disabled = this.data.readOnly;
+      element.name = this.data.fieldName;
 
       if (this.data.maxLen !== null) {
         element.maxLength = this.data.maxLen;
@@ -545,6 +546,7 @@ class CheckboxWidgetAnnotationElement extends WidgetAnnotationElement {
     const element = document.createElement("input");
     element.disabled = this.data.readOnly;
     element.type = "checkbox";
+    element.name = this.data.fieldName;
     if (this.data.fieldValue && this.data.fieldValue !== "Off") {
       element.setAttribute("checked", true);
     }
@@ -620,6 +622,7 @@ class ChoiceWidgetAnnotationElement extends WidgetAnnotationElement {
 
     const selectElement = document.createElement("select");
     selectElement.disabled = this.data.readOnly;
+    selectElement.name = this.data.fieldName;
 
     if (!this.data.combo) {
       // List boxes have a size and (optionally) multiple selection.