Fix TransformGroup

[dr1rrb]

GitHub Issue: fixes #2513

Bug fix

TransformGroup are not working

What is the current behavior?

When the Children collection of TransfromGroup is updated, it invokes the base Transform.NotifyChanged() but this won't update the MatrixCore.

What is the new behavior?

MatrixCore is now updated by the NotifyChanged().

PR Checklist

• Tested code with current supported SDKs
• Docs have been added/updated which fit documentation template (for bug fixes / features)
• Unit Tests and/or UI Tests for the changes have been added (for bug fixes / features) (if applicable)
• Wasm UI Tests are not showing unexpected any differences. Validate PR Screenshots Compare Test Run results.
• Contains NO breaking changes
• Updated the Release Notes
• Associated with an issue (GitHub or internal)

[gitpod-io]

[nventive-devops]

The build 11772 found UI Test snapshots differences.

• android-28: 8 changed over 256

  🚨🚨 Comparison Details (first 20) 🚨🚨

  • ImageStretch_None_Uno_UI_Samples_UITests_ImageTestsControl_Image_Stretch_None
  • Keyboard_Textbox_InsideScrollViewer_Validation_5_-_Remove_Focus_on_numberTextBox
  • PopupWithOverlay_After
  • SequentialAnimations_SamplesApp_Windows_UI_Xaml_Media_Animation_SequentialAnimationsPage
  • TestManipulation_Result
  • TextBox_RoundedCorners_UITests_Shared_Windows_UI_Xaml_Controls_TextBoxTests_TextBox_RoundedCorners
  • ToggleSwitch_TemplateReuseTest_UITests_Shared_Windows_UI_Xaml_Controls_ToggleSwitchControl_ToggleSwitch_TemplateReuse
  • When_InListViewWithoutItemClick_UITests_Shared_Windows_UI_Input_GestureRecognizerTests_RightTappedTests

• android-28-Snap: 13 changed over 653

  🚨🚨 Comparison Details (first 20) 🚨🚨

  • Automation_AutomationProperties_Name_UITests_Shared_Windows_UI_Xaml_Automation_AutomationProperties_Name
  • ComboBox_UITests_Shared_Windows_UI_Xaml_Controls_ComboBox_ComboBox_DropDownPlacement_UITests_Shared_Windows_UI_Xaml_Controls_ComboBox_ComboBox_DropDownPlacement
  • Button_ComboBox_Simple_Uno_UI_Samples_Content_UITests_ButtonTestsControl_ComboBox_Simple
  • ImageBrushTestControl_ImageBrushChangingCornerRadius_Uno_UI_Samples_UITests_ImageBrushTestControl_ImageBrushChangingCornerRadius
  • Image_UITests_Shared_Windows_UI_Xaml_Controls_ImageTests_Image_Stretch_Algmnt_Inf_Horizontal_UITests_Shared_Windows_UI_Xaml_Controls_ImageTests_Image_Stretch_Algmnt_Inf_Horizontal
  • ListView_ListViewResizableText_UITests_Shared_Windows_UI_Xaml_Controls_ListView_ListViewResizableText
  • ListView_ListView_WithScrollViewer_SamplesApp_Windows_UI_Xaml_Controls_ListView_ListView_WithScrollViewer
  • ListView_ListView_With_ListViews_Count_Measure_UITests_Shared_Windows_UI_Xaml_Controls_ListView_ListView_With_ListViews_Count_Measure
  • ListView_UndefinedHeightListView_SamplesApp_Windows_UI_Xaml_Controls_ListView_UndefinedHeightListView
  • TextBlockControl_TextBoxSizeChanging_Uno_UI_Samples_Content_UITests_TextBlockControl_TextBoxSizeChanging
  • TextBlockControl_TextBlockMultilineInStarStackPanel_Uno_UI_Samples_Content_UITests_TextBlockControl_TextBlockMultilineInStarStackPanel
  • TextBox_Uno_UI_Samples_Content_UITests_TextBoxControl_PasswordBox_Reveal_Scroll_Uno_UI_Samples_Content_UITests_TextBoxControl_PasswordBox_Reveal_Scroll
  • Transform_TransformToVisual_Translate2d_SamplesApp_Wasm_Windows_UI_Xaml_Media_Transform_TransformToVisual_Translate2d

• ios: 7 changed over 115

  🚨🚨 Comparison Details (first 20) 🚨🚨

  • DatePickerFlyout_Unloaded_UITests_Shared_Windows_UI_Xaml_Controls_DatePicker_DatePicker_SampleContent
  • Keyboard_Textbox_InsideScrollViewer_Validation_1_-_Remove_Focus_on_filledTextBox
  • Keyboard_Textbox_InsideScrollViewer_Validation_5_-_Remove_Focus_on_numberTextBox
  • Keyboard_Textbox_NoScrollViewer_Validation_2_-_Remove_Focus_on_placeholderTextTextBox
  • Keyboard_Textbox_NoScrollViewer_Validation_0_-_Remove_Focus_on_normalTextBox
  • Keyboard_Textbox_NoScrollViewer_Validation_4_-_Remove_Focus_on_multilineTextBox
  • Keyboard_Textbox_NoScrollViewer_Validation_5_-_Remove_Focus_on_numberTextBox

• ios-Snap: 6 changed over 644

  🚨🚨 Comparison Details (first 20) 🚨🚨

  • Button_ComboBox_Simple_Uno_UI_Samples_Content_UITests_ButtonTestsControl_ComboBox_Simple
  • Button_Custom_Button_With_ContentTemplate_Uno_UI_Samples_Content_UITests_ButtonTestsControl_Custom_Button_With_ContentTemplate
  • ContentControlTestsControl_ContentControl_Nested_TemplatedParent_Uno_UI_Samples_Content_UITests_ContentControlTestsControl_ContentControl_Nested_TemplatedParent
  • Default_Uno_UI_Samples_UITests_Image_Image_Stretch_Uno_UI_Samples_UITests_Image_Image_Stretch
  • Image_Uno_UI_Samples_UITests_Image_Image_Stretch_Alignment_Equal_Uno_UI_Samples_UITests_Image_Image_Stretch_Alignment_Equal
  • MediaPlayerElement_Using__3gp_UITests_Shared_Windows_UI_Xaml_Controls_MediaPlayerElement_MediaPlayerElement_3gp_Extension

• wasm: 2 changed over 657

  🚨🚨 Comparison Details (first 20) 🚨🚨

  • SamplesApp.Windows_UI_Xaml_Media.Animation.SequentialAnimationsPage
  • Uno.UI.Samples.UITests.Image.Image_Margin

• wasm-automated: 5 changed over 312

  🚨🚨 Comparison Details (first 20) 🚨🚨

  • LoadEmptyContentControl_ContentControlNoTemplateNoContent_-_bntContentClear
  • PopupWithOverlay_During
  • SequentialAnimations_SamplesApp_Windows_UI_Xaml_Media_Animation_SequentialAnimationsPage
  • TextBox_RoundedCorners_UITests_Shared_Windows_UI_Xaml_Controls_TextBoxTests_TextBox_RoundedCorners
  • When_TransformToVisual_ScrollViewer_UITests_Shared_Windows_UI_Xaml_UIElementTests_TransformToVisual_ScrollViewer