[Bug] MacCatalyst SelectAllTextBehavior on Editor

[pictos]

On MacCatalyst apps, when you focus on the (Maui)Editor control, the text doesn't show selected. It selects all the text as we want, but right after the system put the cursor in the place that the user did the click, more info in this issue

• https://github.com/xamarin/xamarin-macios/issues/15156

The plan is to discover a way to work around this behavior or find the correct way.