[enh] add welcome action to help menu in main_window.ui

tikka/slots/pyqt/resources/gui/windows/main_window.ui

@@ -83,6 +83,7 @@
     <property name="title">
      <string>&amp;Help</string>
     </property>
+    <addaction name="actionWelcome"/>
     <addaction name="actionCurrency"/>
     <addaction name="actionG1_licence"/>
     <addaction name="actionConfiguration"/>
@@ -210,6 +211,11 @@
     <string>Account &amp;table</string>
    </property>
   </action>
+  <action name="actionWelcome">
+   <property name="text">
+    <string>&amp;Welcome</string>
+   </property>
+  </action>
  </widget>
  <resources>
   <include location="../../icons/tikka.slots.pyqt.resources.icons.index.qrc"/>

tikka/slots/pyqt/windows/main.py

@@ -112,6 +112,7 @@ class MainWindow(QMainWindow, Ui_MainWindow):
         self.actionAdd_node.triggered.connect(self.open_add_node_window)
 
         # help menu
+        self.actionWelcome.triggered.connect(self.open_welcome_window)
         self.actionCurrency.triggered.connect(self.add_currency_tab)
         self.actionG1_licence.triggered.connect(self.add_licence_tab)
         self.actionConfiguration.triggered.connect(self.open_configuration_window)