fix(trace): fix drawer bg color (#68934)

Author: JonasBa

static/app/views/performance/newTraceDetails/traceDrawer/traceDrawer.tsx

@@ -610,7 +610,6 @@ const PanelWrapper = styled('div')<{
 const SmallerChevronIcon = styled(IconChevron)`
   width: 13px;
   height: 13px;
-
   transition: none;
 `;
 
@@ -631,6 +630,7 @@ const TabsHeightContainer = styled('div')<{
 
 const TabsLayout = styled('div')`
   display: grid;
+  background: ${p => p.theme.backgroundSecondary};
   grid-template-columns: auto 1fr auto;
   padding-left: ${space(0.25)};
   padding-right: ${space(0.5)};