update branchlist after creating a branch (#702)

src/app.rs

@@ -475,6 +475,9 @@ impl App {
         if flags.contains(NeedsUpdate::COMMANDS) {
             self.update_commands();
         }
+        if flags.contains(NeedsUpdate::BRANCHES) {
+            self.select_branch_popup.update_branches()?;
+        }
 
         Ok(())
     }

src/components/create_branch.rs

@@ -123,7 +123,7 @@ impl CreateBranchComponent {
         match res {
             Ok(_) => {
                 self.queue.borrow_mut().push_back(
-                    InternalEvent::Update(NeedsUpdate::ALL),
+                    InternalEvent::Update(NeedsUpdate::BRANCHES),
                 );
             }
             Err(e) => {

src/queue.rs

@@ -12,6 +12,8 @@ bitflags! {
         const DIFF = 0b010;
         /// commands might need updating (app::update_commands)
         const COMMANDS = 0b100;
+        /// branches have changed
+        const BRANCHES = 0b1000;
     }
 }