debugger: Reduce indent level and step size in variable list (#30122)

Anthony Eid created 

This improves the look of the variable list when it's the debug panel is
docked on a side

### Before

![image](https://github.com/user-attachments/assets/6e886fc4-1579-4f4c-bda5-6850d080f34b)
### After

![image](https://github.com/user-attachments/assets/5c4528e5-aa01-4035-9f67-fdf22ce82e34)

Release Notes:

- N/A

Change summary

crates/debugger_ui/src/session/running/variable_list.rs | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)

Detailed changes

crates/debugger_ui/src/session/running/variable_list.rs 🔗 

@@ -675,6 +675,7 @@ impl VariableList {
         div()
             .id(var_ref as usize)
             .group("variable_list_entry")
+            .pl_2()
             .border_1()
             .border_r_2()
             .border_color(border_color)
@@ -692,8 +693,8 @@ impl VariableList {
                 ListItem::new(SharedString::from(format!("scope-{}", var_ref)))
                     .selectable(false)
                     .disabled(self.disabled)
-                    .indent_level(state.depth + 1)
-                    .indent_step_size(px(20.))
+                    .indent_level(state.depth)
+                    .indent_step_size(px(10.))
                     .always_show_disclosure_icon(true)
                     .toggle(state.is_expanded)
                     .on_toggle({
@@ -772,6 +773,7 @@ impl VariableList {
         div()
             .id(variable.item_id())
             .group("variable_list_entry")
+            .pl_2()
             .border_1()
             .border_r_2()
             .border_color(border_color)
@@ -791,8 +793,8 @@ impl VariableList {
                 )))
                 .disabled(self.disabled)
                 .selectable(false)
-                .indent_level(state.depth + 1_usize)
-                .indent_step_size(px(20.))
+                .indent_level(state.depth)
+                .indent_step_size(px(10.))
                 .always_show_disclosure_icon(true)
                 .when(var_ref > 0, |list_item| {
                     list_item.toggle(state.is_expanded).on_toggle(cx.listener({