Add settings button on PageStart

Disable some items when no Server has been set

client/ui/pages_logic/GeneralSettingsLogic.cpp

@@ -13,6 +13,7 @@ GeneralSettingsLogic::GeneralSettingsLogic(UiLogic *logic, QObject *parent):
 void GeneralSettingsLogic::onUpdatePage()
 {
     uiLogic()->selectedServerIndex = m_settings->defaultServerIndex();
+	set_existsAnyServer(uiLogic()->selectedServerIndex >= 0);
     uiLogic()->selectedDockerContainer = m_settings->defaultContainer(m_settings->defaultServerIndex());
 
     set_pushButtonGeneralSettingsShareConnectionEnable(m_settings->haveAuthData(m_settings->defaultServerIndex()));

client/ui/pages_logic/GeneralSettingsLogic.h

@@ -10,6 +10,7 @@ class GeneralSettingsLogic : public PageLogicBase
     Q_OBJECT
 
     AUTO_PROPERTY(bool, pushButtonGeneralSettingsShareConnectionEnable)
+	AUTO_PROPERTY(bool, existsAnyServer)
 
 public:
     Q_INVOKABLE void onUpdatePage() override;

client/ui/qml/Pages/PageGeneralSettings.qml

@@ -85,6 +85,7 @@ PageBase {
                 Layout.preferredHeight: 30
                 icon.source: "qrc:/images/svg/vpn_key_black_24dp.svg"
                 text: qsTr("Server Settings")
+                enabled: GeneralSettingsLogic.existsAnyServer
                 onClicked: {
                     GeneralSettingsLogic.onPushButtonGeneralSettingsServerSettingsClicked()
                 }
@@ -101,7 +102,8 @@ PageBase {
                 Layout.preferredHeight: 30
                 icon.source: "qrc:/images/svg/share_black_24dp.svg"
                 text: qsTr("Share connection")
-                enabled: GeneralSettingsLogic.pushButtonGeneralSettingsShareConnectionEnable
+                enabled: GeneralSettingsLogic.pushButtonGeneralSettingsShareConnectionEnable &&
+                         GeneralSettingsLogic.existsAnyServer
                 onClicked: {
                     GeneralSettingsLogic.onPushButtonGeneralSettingsShareConnectionClicked()
                 }

client/ui/qml/Pages/PageStart.qml

@@ -15,6 +15,23 @@ PageBase {
         visible: pageLoader.depth > 1
     }
 
+    ImageButtonType {
+        anchors {
+            right: parent.right
+            top: parent.top
+        }
+
+        width: 41
+        height: 41
+        imgMarginHover: 8
+        imgMargin: 9
+        icon.source: "qrc:/images/settings_grey.png"
+        visible: !GeneralSettingsLogic.existsAnyServer
+        onClicked: {
+            UiLogic.goToPage(PageEnum.GeneralSettings)
+        }
+    }
+
     Caption {
         id: caption
         text: start_switch_page.checked ?