Created Unassigned: IncreaseIndentation and DecreaseIndentation not available for RichTextBox [22318]

Hello,

It looks like both commands are disabled for RichTextBox, they work in the base Microsoft version.

sample code:

<ToolBar Name="RteToolBar"
DockPanel.Dock="Top"
ToolBarTray.IsLocked="True"
Height="30"
Width="Auto"
Grid.Row="1">
<Button Content="Increses"
CommandTarget="{Binding ElementName=_richTextBox}"
Command="EditingCommands.IncreaseIndentation" />
<Button Content="Decreses"
CommandTarget="{Binding ElementName=_richTextBox}"
Command="EditingCommands.DecreaseIndentation" />
<Button Content="bla"
CommandTarget="{Binding ElementName=_richTextBox}"
Command="EditingCommands.ToggleBold" />

</ToolBar>
<xctk:RichTextBox x:Name="_richTextBox"
Grid.Row="2"
Margin="10"
BorderBrush="Gray"
Padding="10"
Text="{Binding Notes}"
ScrollViewer.VerticalScrollBarVisibility="Auto">

<RichTextBox.CommandBindings>
<CommandBinding Command="EditingCommands.IncreaseIndentation" />
<CommandBinding Command="EditingCommands.DecreaseIndentation" />
<CommandBinding Command="EditingCommands.ToggleBold" />
</RichTextBox.CommandBindings>
</xctk:RichTextBox>