[tui] Highlight border of active widget.

src/tui/menu_bar.rs

@@ -1,4 +1,4 @@
-use crate::tui::component::{Action, Component, ComponentState};
+use crate::tui::component::{Action, Component, ComponentState, FocusState};
 use crate::tui::menu_bar::MenuBarItemOption::{
     About, Exit, Reload, Save, ShowHideExplorer, ShowHideLogger,
 };
@@ -108,7 +108,11 @@ impl MenuBar {
         };
         Tabs::new(titles)
             .style(tabs_style)
-            .block(Block::default().borders(Borders::ALL))
+            .block(
+                Block::default()
+                    .borders(Borders::ALL)
+                    .border_style(Style::default().fg(self.component_state.get_active_color())),
+            )
             .highlight_style(highlight_style)
             .select(self.selected as usize)
             .render(area, buf);