Revert "git_panel: Pad end of list to avoid obscuring final entry with horizontal scrollbar (#28823)" (#28971)

This reverts commit 1d98b33ae0.

Not sure why, but seems like this breaks the binary search used to
correlate items to each other in the lists.

Release Notes:

- N/A

crates/git_ui/src/git_panel.rs

@@ -604,7 +604,7 @@ impl GitPanel {
             if let Ok(ix) = self.entries[conflicted_start..conflicted_start + self.conflicted_count]
                 .binary_search_by(|entry| entry.status_entry().unwrap().repo_path.cmp(&path))
             {
-                return Some(ix);
+                return Some(conflicted_start + ix);
             }
         }
         if self.tracked_count > 0 {
@@ -616,7 +616,7 @@ impl GitPanel {
             if let Ok(ix) = self.entries[tracked_start..tracked_start + self.tracked_count]
                 .binary_search_by(|entry| entry.status_entry().unwrap().repo_path.cmp(&path))
             {
-                return Some(ix);
+                return Some(tracked_start + ix);
             }
         }
         if self.new_count > 0 {
@@ -632,7 +632,7 @@ impl GitPanel {
             if let Ok(ix) = self.entries[untracked_start..untracked_start + self.new_count]
                 .binary_search_by(|entry| entry.status_entry().unwrap().repo_path.cmp(&path))
             {
-                return Some(ix);
+                return Some(untracked_start + ix);
             }
         }
         None