updated .fa-ban icon to update via js & ws; changed taken_roles (or its cognates) everywhere to starter_roles, as 'taken' will be used in respect to roles thru-out entire game, not just this seat-determining phase of Role Select; patched up chosen cards not disappearing upon previous gamer choice, & a try,except that catches attempts to select one anyway w. a 409 & optimistic card rollback; new IT confirms this 409

src/static_src/tests/RoleSelectSpec.js

@@ -180,7 +180,7 @@ describe("RoleSelect", () => {
             stack.className = "card-stack";
             stack.dataset.state = "ineligible";
             stack.dataset.userSlots = "1";
-            stack.dataset.takenRoles = "";
+            stack.dataset.starterRoles = "";
             testDiv.appendChild(stack);
         });