Save zoom level of the game and restore it when quitting the login scenes

SelectCompanionScene with zoom on mobile

front/src/Phaser/Services/WaScaleManager.ts

@@ -10,6 +10,7 @@ class WaScaleManager {
     private scaleManager!: ScaleManager;
     private game!: Game;
     private actualZoom: number = 1;
+    private _saveZoom: number = 1;
 
     public constructor(private minGamePixelsNumber: number, private absoluteMinPixelNumber: number) {
         this.hdpiManager = new HdpiManager(minGamePixelsNumber, absoluteMinPixelNumber);
@@ -57,6 +58,15 @@ class WaScaleManager {
         this.applyNewSize();
     }
 
+    public saveZoom(): void {
+        this._saveZoom = this.hdpiManager.zoomModifier;
+    }
+
+    public restoreZoom(): void{
+        this.hdpiManager.zoomModifier = this._saveZoom;
+        this.applyNewSize();
+    }
+
     /**
      * This is used to scale back the ui components to counter-act the zoom.
      */