feat: add state symbol id field

Author: mgechev

src/background/model/background-app.ts

@@ -86,7 +86,8 @@ export class BackgroundApp {
       const nextState = index.get(id);
       if (nextState) {
         let state: State | null = nextState.stateFactory();
-        if (lastState instanceof state.constructor) {
+        if (lastState instanceof state.constructor &&
+            lastState.stateSymbolId === state.stateSymbolId) {
           state = lastState.nextState(id);
         }
         if (state) {

src/background/states/state.ts

@@ -13,4 +13,8 @@ export abstract class State {
   abstract nextState(id: string): State | null;
 
   destroy() {};
+
+  get stateSymbolId() {
+    return this.symbolId;
+  }
 }

src/ui/model/state-manager.ts

@@ -43,11 +43,12 @@ export class StateManager {
     if (!this.transitionInProgress) {
       this.transitionInProgress = id;
     }
-    if (this.lastTransition === id) {
-      const last = this.history[this.history.length - 1];
-      this.transitionInProgress = null;
-      return Promise.resolve(last);
-    }
+    // Not really required because of the logic in directStateTransfer in the background app
+    // if (this.lastTransition === id) {
+    //   const last = this.history[this.history.length - 1];
+    //   this.transitionInProgress = null;
+    //   return Promise.resolve(last);
+    // }
     return (!isMetaNodeId(id) ?
       this.state.directStateTransfer(id) :
       this.state.nextState(id))