fix: coalesce rapid viewport scrolling redraws

src/editor.rs

@@ -4457,6 +4457,10 @@ impl Editor {
                         | Action::Right
                         | Action::Down
                         | Action::Up
+                        | Action::ScrollUp
+                        | Action::ScrollDown
+                        | Action::ScrollHalfUp
+                        | Action::ScrollHalfDown
                         | Action::LineStart
                         | Action::LineEnd
                         | Action::DocumentStart
@@ -4472,6 +4476,18 @@ impl Editor {
             )
     }
 
+    pub(crate) fn viewport_scroll_action(&self, input: &Input) -> Option<&'static str> {
+        match self.bindings.get(&self.active.view.mode)?.get(input)? {
+            Binding::Action(
+                action @ (Action::ScrollUp
+                | Action::ScrollDown
+                | Action::ScrollHalfUp
+                | Action::ScrollHalfDown),
+            ) => Some(action.entry().name),
+            _ => None,
+        }
+    }
+
     pub fn diff_editable(&self) -> bool {
         self.diff().is_some_and(|diff| {
             self.diff_buffer_focus()