Function txt_editable 

pub fn txt_editable(
    child: impl IntoUiNode,
    enabled: impl IntoVar<bool>,
) -> UiNode

P Enable text caret, input and makes the widget focusable.

If the txt variable is read-only, this is ignored, if the var is writeable this enables text input and modifies the variable.

Sets the TEXT_EDITABLE_VAR.