miniprofiler_ui: Improve MiniProfiler to use uniform list (#43457)

Release Notes:

- N/A

---

- Apply uniform_list for timing list for performance.
- Add paddings for window.
- Add space to `ms`, before: `100ms` after `100 ms`.

## Before 

<img width="1392" height="860" alt="image"
src="https://github.com/user-attachments/assets/9706a96f-7093-4d4f-832f-306948a9b17b"
/>

## After 

<img width="1392" height="864" alt="image"
src="https://github.com/user-attachments/assets/38df1b71-15e7-4101-b0c9-ecdcdb7752d7"
/>

crates/gpui/src/elements/uniform_list.rs

@@ -11,7 +11,7 @@ use crate::{
     StyleRefinement, Styled, Window, point, size,
 };
 use smallvec::SmallVec;
-use std::{cell::RefCell, cmp, ops::Range, rc::Rc};
+use std::{cell::RefCell, cmp, ops::Range, rc::Rc, usize};
 
 use super::ListHorizontalSizingBehavior;
 
@@ -235,6 +235,11 @@ impl UniformListScrollHandle {
             false
         }
     }
+
+    /// Scroll to the bottom of the list.
+    pub fn scroll_to_bottom(&self) {
+        self.scroll_to_item(usize::MAX, ScrollStrategy::Bottom);
+    }
 }
 
 impl Styled for UniformList {