ReadOnly TextBox without carret on linux.

[davidsi02]

Hello,

I have a UserControl with TextBox where I don't want to have direct input so it's read-only and the input is done by a KeyDown Event and a button next to it and it works fine in WEB and UWP but in Linux everytime I click the button it selects the text inside the textbox and it gets a carret instead of triggering the button click event.

I think the problem could be solved here so it doesn't have the carret anymore when it is ReadOnly:

uno/src/Uno.UI.Runtime.Skia.Gtk/UI/Xaml/Controls/TextBoxViewExtension.cs

Line 166 in 4a2e08d

textView.Editable = !textBox.IsReadOnly;