fix: deactivate the active server when it's modified

fixes #127

DNSecure/Views/DetailView.swift

@@ -51,6 +51,10 @@ extension DetailView: View {
             }
         }
         .navigationTitle(self.server.name)
+        .onChange(of: self.server) { _ in
+            guard self.isOn else { return }
+            self.isOn = false
+        }
     }
 
     @ViewBuilder private var serverConfigurationSections: some View {