tbd-station-14/Content.Client/UserInterface/Controls/SplitBar.xaml

<controls:SplitBar xmlns="https://spacestation14.io"
                      xmlns:controls="clr-namespace:Content.Client.UserInterface.Controls"
                      MouseFilter="Stop"
                      Orientation="Horizontal"
                      HorizontalExpand="True"
                      MinSize="0 30">
</controls:SplitBar>