Allow placing a counter that doesn't already exist

src/modules/record_sheet.js

@@ -94,12 +94,17 @@ export function getSelected() {
 }
 
 export function select(data) {
-  const selector =
-  `#record-sheet .soldier-record[data-number="${data.number}"][data-allegiance="${data.allegiance}"]`
-
   unSelect();
+
+  if (!data) {
+    return;
+  }
+
+  const { allegiance: al, number: n } = data,
+    selector = `.soldier-record[data-number="${n}"][data-allegiance="${al}"]`;
+
   document.querySelector(selector).classList.add('selected');
-  document.getElementById('toggle-prone-counter').checked = data.prone;
+  document.querySelector('#toggle-prone-counter').checked = data.prone;
 }
 
 export function endMove() {