Flyout close button icon is incorrect when setting flow direction right to left

[mahdi-ataollahi]

Hello, when I use flyout in a Right-to-left window, the close button's icon keeps its direction like Left-to-right mode. It's should change. Just look at this a simple code:
<UserControl FlowDirection="RightToLeft">
<Controls:Flyout IsOpen="True"/>
</UserControl>

Left to right

Right to left

I know I can use my custom header to fix it, but I think it's a bug, so I report it, thnx

[punker76]

This will be fixed and available in 1.5.0