Splitter ui elements

Split horizontal
This is panel 1
This is panel 2
Split vertical
This is panel 1
This is panel 2
Multi split
This is panel 1
Panel 1
Panel 2

Panels pre-sizes
This is panel 1
This is panel 2
Panels min size
This is panel 1
This is panel 2
Gutter size
This is panel 1
This is panel 2