Enable Enter-Press for submit in modals.

templates/modals/edit_clan.html

@@ -149,6 +149,12 @@
                     });
             });
 
+            editClanModal.addEventListener('keypress', event => {
+                if (event.key === 'Enter') {
+                    submitButton.click();
+                }
+            });
+
             editClanModal.addEventListener('hidden.bs.modal', _ => {
                 submitButton.removeEventListener('click', submitClanHandler);