Only show Welcome-Pages when needed. [CURA-6057]

cura/CuraApplication.py

@@ -245,8 +245,6 @@ class CuraApplication(QtApplication):
 
         self._update_platform_activity_timer = None
 
-        self._need_to_show_user_agreement = True
-
         self._sidebar_custom_menu_items = []  # type: list # Keeps list of custom menu items for the side bar
 
         self._plugins_loaded = False
@@ -530,8 +528,6 @@ class CuraApplication(QtApplication):
         preferences.addPreference("cura/expanded_brands", "")
         preferences.addPreference("cura/expanded_types", "")
 
-        self._need_to_show_user_agreement = not preferences.getValue("general/accepted_user_agreement")
-
         for key in [
             "dialog_load_path",  # dialog_save_path is in LocalFileOutputDevicePlugin
             "dialog_profile_path",
@@ -553,11 +549,11 @@ class CuraApplication(QtApplication):
 
     @pyqtProperty(bool)
     def needToShowUserAgreement(self) -> bool:
-        return self._need_to_show_user_agreement
+        return not self.getPreferences().getValue("general/accepted_user_agreement")
 
     @pyqtSlot(bool)
     def setNeedToShowUserAgreement(self, set_value = True) -> None:
-        self._need_to_show_user_agreement = set_value
+        self.getPreferences().setValue("general/accepted_user_agreement", not set_value)
 
     @pyqtSlot(str, str)
     def writeToLog(self, severity: str, message: str) -> None:

resources/qml/Cura.qml

@@ -45,7 +45,7 @@ UM.MainWindow
     WelcomeDialog
     {
         id: welcomeDialog
-        visible: CuraApplication.needToShowUserAgreement
+        visible: true  // True, so if somehow no preferences are found/loaded, it's shown anyway.
     }
 
     Rectangle
@@ -83,6 +83,13 @@ UM.MainWindow
         // This has been fixed for QtQuick Controls 2 since the Shortcut item has a context property.
         Cura.Actions.parent = backgroundItem
         CuraApplication.purgeWindows()
+
+        if (CuraApplication.needToShowUserAgreement)
+        {
+            welcomeDialog.visible = true;
+            welcomeDialog.currentStep = 0;
+            welcomeDialog.show();
+        }
     }
 
     Item