Add scrollbar in branchlist

Author: remique

src/components/select_branch.rs

@@ -21,7 +21,7 @@ use tui::{
     backend::Backend,
     layout::{Alignment, Rect},
     text::{Span, Spans, Text},
-    widgets::{Block, BorderType, Borders, Clear, Paragraph},
+    widgets::{Block, Borders, Clear, Paragraph},
     Frame,
 };
 
@@ -79,11 +79,18 @@ impl DrawableComponent for SelectBranchComponent {
                     Block::default()
                         .title(strings::SELECT_BRANCH_POPUP_MSG)
                         .borders(Borders::ALL)
-                        .border_type(BorderType::Thick),
                 )
                 .alignment(Alignment::Left),
                 area,
             );
+
+            ui::draw_scrollbar(
+                f,
+                area,
+                &self.theme,
+                self.branch_names.len(),
+                self.scroll_top.get(),
+            );
         }
 
         Ok(())