VPN: Refresh tunnel statuses when app gets to the foreground

Because the tunnel could've be activated from iOS Settings now

WireGuard/WireGuard/UI/iOS/AppDelegate.swift

@@ -37,4 +37,8 @@ class AppDelegate: UIResponder, UIApplicationDelegate {
         mainVC?.tunnelsListVC?.importFromFile(url: url)
         return true
     }
+
+    func applicationDidBecomeActive(_ application: UIApplication) {
+        mainVC?.tunnelsListVC?.refreshTunnelConnectionStatuses()
+    }
 }

WireGuard/WireGuard/UI/iOS/TunnelsListTableViewController.swift

@@ -223,6 +223,16 @@ class TunnelsListTableViewController: UIViewController {
             }
         }
     }
+
+    func refreshTunnelConnectionStatuses() {
+        if let tunnelsManager = tunnelsManager {
+            tunnelsManager.refreshConnectionStatuses()
+        } else {
+            onTunnelsManagerReady = { tunnelsManager in
+                tunnelsManager.refreshConnectionStatuses()
+            }
+        }
+    }
 }
 
 // MARK: UIDocumentPickerDelegate