debugger: Make the remove button easier to click for breakpoint list entries (#32772)

Closes #31574 

Move this button a bit to the left so it doesn't get blocked by the
hitbox of the scrollbar.

Also makes the list entries a bit thicker vertically so that the button
can be `XSmall` instead of `Indicator`-sized again.

Release Notes:

- Debugger Beta: fixed a layout issue that made it hard to click the
remove (`X`) button for entries in the breakpoint list.

crates/debugger_ui/src/session/running/breakpoint_list.rs

@@ -506,6 +506,8 @@ impl LineBreakpoint {
             cx.stop_propagation();
         })
         .end_hover_slot(
+            h_flex()
+                .child(
                     IconButton::new(
                         SharedString::from(format!(
                             "breakpoint-ui-on-click-go-to-line-remove-{:?}/{}:{}",
@@ -537,13 +539,15 @@ impl LineBreakpoint {
                             cx,
                         )
                     })
-            .icon_size(ui::IconSize::Indicator),
+                    .icon_size(ui::IconSize::XSmall),
+                )
+                .right_4(),
         )
         .child(
             v_flex()
                 .py_1()
                 .gap_1()
-                .min_h(px(22.))
+                .min_h(px(26.))
                 .justify_center()
                 .id(SharedString::from(format!(
                     "breakpoint-ui-on-click-go-to-line-{:?}/{}:{}",
@@ -650,7 +654,7 @@ impl ExceptionBreakpoint {
             v_flex()
                 .py_1()
                 .gap_1()
-                .min_h(px(22.))
+                .min_h(px(26.))
                 .justify_center()
                 .id(("exception-breakpoint-label", ix))
                 .child(