If the splitter container has 100%, the height of the Splitter panes is changed when the splitbar is moved to the right or left.
The panes of the splitter have the wrong height when it is moved to the left and the correct one when it is moved to the right.
Splitbar panes should have the same height regardless of splitbar moving.
When the splitbar is moved to the left, the left position of the second splitbar pane should be updated before its width. For now, it is updated after it, which causes showing a horizontal scrollbar of the Splitter parent for a moment. As result, the Splitter pane height is calculated wrongly.