focus search bar's text box when focusing toolbar itself

- toolbar focus makes no sense anyway, because it does not interact with keyboard, but text box does

fyrox-ui/src/searchbar.rs

@@ -24,6 +24,7 @@
 
 #![warn(missing_docs)]
 
+use crate::widget::WidgetMessage;
 use crate::{
     border::BorderBuilder,
     brush::Brush,
@@ -121,6 +122,11 @@ impl Control for SearchBar {
                     MessageDirection::ToWidget,
                     text.clone(),
                 ));
+            } else if let Some(WidgetMessage::Focus) = message.data() {
+                ui.send_message(WidgetMessage::focus(
+                    *self.text_box,
+                    MessageDirection::ToWidget,
+                ));
             }
         }