gwl: Adjust state connection id handling

Author: anaximeno

files/usr/share/cinnamon/applets/[email protected]/appGroup.js

@@ -1208,7 +1208,7 @@ var AppGroup = class AppGroup {
     }
 
     destroy(skipRefCleanup) {
-        if (this.groupStateConnectionId) {
+        if (this.groupStateConnectionId > 0) {
             this.groupState.disconnect(this.groupStateConnectionId);
         }
         this.signals.disconnectAllSignals();

files/usr/share/cinnamon/applets/[email protected]/state.js

@@ -252,14 +252,14 @@ var createStore = function(state = {}, listeners = [], connections = 0) {
         }
         if (listener) {
             let newKeys = intersect(keys, listener.keys, true);
-            listener.keys.concat(newKeys);
+            listener.keys = listener.keys.concat(newKeys);
         } else {
             listeners.push({keys, callback, id});
         }
     }
 
     function connect(actions, callback) {
-        const id = connections++;
+        const id = ++connections;
         if (Array.isArray(actions)) {
             _connect(actions, callback, id);
         } else if (typeof actions === 'string') {