fx-compat: Item box: Fix item type menulist

- Use IDs as list item values
- Use addEventListener() so events are actually received
- Put menulist inside <td>
    * This causes a small appearance regression at the moment because
      <td> margins/padding are a bit off, but that issue is visible on
      all other fields already.

chrome/content/zotero/elements/itemBox.js

@@ -752,26 +752,28 @@
 		}
 		
 		addItemTypeMenu() {
+			var td = document.createElement('td');
 			var menulist = document.createXULElement("menulist", { is: "menulist-item-types" });
 			menulist.id = "item-type-menu";
 			menulist.className = "zotero-clicky";
-			menulist.onCommand = (event) => {
+			menulist.addEventListener('command', (event) => {
 				var target = event.target;
 				this.changeTypeTo(target.value, target);
-			};
-			menulist.onFocus = (event) => {
+			});
+			menulist.addEventListener('focus', () => {
 				this.ensureElementIsVisible(menulist);
-			};
-			menulist.onKeyPress = (event) => {
+			});
+			menulist.addEventListener('keypress', (event) => {
 				if (event.keyCode == event.DOM_VK_TAB) {
 					this.itemTypeMenuTab(event);
 				}
-			};
-			this._infoTable.firstChild.appendChild(menulist);
+			});
+			td.appendChild(menulist);
+			this._infoTable.firstChild.appendChild(td);
 		}
 		
 		updateItemTypeMenuSelection() {
-			this.itemTypeMenu.value = this.item.itemType;
+			this.itemTypeMenu.value = this.item.itemTypeID;
 		}
 		
 		addDynamicRow(label, value, beforeElement) {

chrome/content/zotero/elements/menulistItemTypes.js

@@ -54,7 +54,7 @@
 			var itemTypes = [];
 			for (let i = 0; i < t.length; i++) {
 				itemTypes.push({
-					name: t[i].name,
+					id: t[i].id,
 					localized: Zotero.ItemTypes.getLocalizedString(t[i].id)
 				});
 			}
@@ -64,7 +64,7 @@
 			for (let i = 0; i < itemTypes.length; i++) {
 				let name = itemTypes[i].name;
 				if (name != 'attachment' && name != 'note' && name != 'annotation') {
-					this.appendItem(itemTypes[i].localized, itemTypes[i].name);
+					this.appendItem(itemTypes[i].localized, itemTypes[i].id);
 				}
 			}