Enable Enter-Press for submit in modals.

templates/modals/edit_player.html

@@ -95,6 +95,12 @@
                 playerName.value = event.relatedTarget.closest('.input-group').querySelector('span').innerText;
             });
 
+            editPlayerModal.addEventListener('keypress', event => {
+                if (event.key === 'Enter') {
+                    submitButton.click();
+                }
+            });
+
             editPlayerModal.addEventListener('hide.bs.modal', _ => {
                 submitButton.removeEventListener('click', submitPlayerHandler);