Persist option3daction state

- the selected option3daction state is persisted between sessions.
- option3daction state do not change to 2D anymore when there is no
3D view in the scene. It just becomes disabled.
- option3daction is enabled/disabled based on existence of Nodes
  not View3D
- some relevant tweaks and refactoring.

Task-number: QDS-1538
Change-Id: I27f6f00cf7840204af6fc0f033dcf55bdddc7ad4
Reviewed-by: Miikka Heikkinen <miikka.heikkinen@qt.io>
Reviewed-by: Thomas Hartmann <thomas.hartmann@qt.io>

1 files changed, 1 insertions, 0 deletions

diff --git a/src/plugins/qmldesigner/designersettings.cpp b/src/plugins/qmldesigner/designersettings.cpp
index 4944cef9db..328d07bb72 100644
--- a/src/plugins/qmldesigner/designersettings.cpp
+++ b/src/plugins/qmldesigner/designersettings.cpp
@@ -84,6 +84,7 @@ void DesignerSettings::fromSettings(QSettings *settings)
                  );
     restoreValue(settings, DesignerSettingsKey::SIMPLE_COLOR_PALETTE_CONTENT, QStringList());
     restoreValue(settings, DesignerSettingsKey::ALWAYS_DESIGN_MODE, true);
+    restoreValue(settings, DesignerSettingsKey::VIEW_3D_ACTIVE, false);
 
     settings->endGroup();
     settings->endGroup();