Ref T82, removed add button for servers, only save

* save will add a new server when not already existing
* when saved with same name, it will override values
* default values for FSD setup
* adjusted validation

src/blackgui/components/settingsnetworkserverscomponent.h

@@ -24,7 +24,6 @@ class QModelIndex;
 class QWidget;
 
 namespace Ui { class CSettingsNetworkServersComponent; }
-
 namespace BlackGui
 {
     namespace Components
@@ -40,7 +39,7 @@ namespace BlackGui
             explicit CSettingsNetworkServersComponent(QWidget *parent = nullptr);
 
             //! Destructor
-            ~CSettingsNetworkServersComponent();
+            virtual ~CSettingsNetworkServersComponent();
 
         private slots:
             //! Reload settings