fix rerender userTag at WalletVC

@@ -164,6 +164,52 @@ import SwiftEventBus
         }
     }
 
+    public override func viewWillAppear(_ animated: Bool) {
+        super.viewWillAppear(animated)
+        
+        let userTag = swiftApi().getUserTag()
+        if (questionnaireButton.currentTitle != userTag) {
+            if (userTag != "") {
+                questionnaireButton.setTitle(userTag, for: .normal)
+                questionnaireButton.titleLabel?.font = UIFont.systemFont(ofSize: 13, weight: .semibold)
+                questionnaireButton.setTitleColor(.white, for: .normal)
+        //        questionnaireButton.sizeToFit()
+                questionnaireButton.frame = CGRect(x: 0.0, y: 0.0, width: questionnaireButton.intrinsicContentSize.width, height: questionnaireButton.intrinsicContentSize.height)
+                questionnaireButton.applyGradient(colours: [UIColor(red: 0.40, green: 0.77, blue: 0.28, alpha: 1.00), UIColor(red: 0.10, green: 0.66, blue: 0.72, alpha: 1.00)], gradient: GradientOrientation.horizontal, cornerRadius: 7.0)
+                // Shadow Color
+                questionnaireButton.layer.shadowColor = UIColor(red: 0.33, green: 0.38, blue: 0.43, alpha: 1.00).cgColor
+                questionnaireButton.layer.shadowOffset = CGSize(width: 0.0, height: 2.0)
+                questionnaireButton.layer.shadowOpacity = 1.0
+                questionnaireButton.layer.shadowRadius = 0.0
+                questionnaireButton.layer.masksToBounds = false
+            } else {
+                questionnaireButton.setTitle("+Προτιμήσεις", for: .normal)
+                questionnaireButton.titleLabel?.font = UIFont.systemFont(ofSize: 13, weight: .semibold)
+                questionnaireButton.setTitleColor(UIColor(red: 0.31, green: 0.62, blue: 0.18, alpha: 1.00), for: .normal)
+                questionnaireButton.backgroundColor = UIColor(red: 0.90, green: 0.90, blue: 0.90, alpha: 1.00)
+                questionnaireButton.frame = CGRect(x: 0.0, y: 0.0, width: questionnaireButton.intrinsicContentSize.width, height: questionnaireButton.intrinsicContentSize.height)
+            }
+            questionnaireButton.layer.cornerRadius = 7.0
+        }
+    }
+
+    public override func viewDidLayoutSubviews() {
+        super.viewDidLayoutSubviews()
+
+        if let headerView = tableView.tableHeaderView {
+
+            let height = headerView.systemLayoutSizeFitting(UIView.layoutFittingCompressedSize).height
+            var headerFrame = headerView.frame
+
+            //Comparison necessary to avoid infinite loop
+            if height != headerFrame.size.height {
+                headerFrame.size.height = height
+                headerView.frame = headerFrame
+                tableView.tableHeaderView = headerView
+            }
+        }
+    }
+    
     // MARK: - Actions
     @IBAction func qustionnaireButtonAction(_ sender: Any) {
         swiftApi().openQuestionnaire(self);