Can stop all timers without a class, too

game.js

@@ -82,11 +82,18 @@ function stopRoomTimers(room, state) {
 
 }
 
-function stopClassTimers(timerClass, state) {
+function stopClassTimers(timerClass, state, inverse) {
   const matches = state.timers.filter(timer => timer.classes.includes(timerClass));
-  matches.forEach(timer => clearTimeout(timer.timeout));
+  const others = state.timers.filter(timer => !timer.classes.includes(timerClass));
+
+  if (inverse) {
+    others.forEach(timer => clearTimeout(timer.timeout));
+    state.timers = matches;
+  } else {
+    matches.forEach(timer => clearTimeout(timer.timeout));
+    state.timers = others;
+  }
 
-  state.timers = state.timers.filter(timer => !timer.classes.includes(timerClass));
 
 }