RPP: fix bad dark mode hover state on 3P Insight

Light mode: https://screenshot.googleplex.com/ACdvQHRkH67UWWC

Dark mode: https://screenshot.googleplex.com/SPTarX2SCG4n4g7

Fixed: 382180478
Change-Id: I3e727afd60781502169be3deea83bedcda1626d3
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/6070378
Auto-Submit: Jack Franklin <[email protected]>
Reviewed-by: Connor Clark <[email protected]>
Commit-Queue: Connor Clark <[email protected]>

Author: jackfranklin

front_end/panels/timeline/components/insights/table.css

@@ -28,7 +28,7 @@ table.interactive tbody tr {
 
 table.interactive tbody tr:hover,
 table.interactive tbody tr.selected {
-  background-color: var(--app-color-performance-sidebar-table-row-hover);
+  background-color: var(--sys-color-state-hover-on-subtle);
 }
 
 table thead th {

front_end/ui/legacy/themeColors.css

@@ -376,7 +376,6 @@
   --app-color-performance-sidebar-time-range: var(--ref-palette-pink60);
   --app-color-performance-sidebar-label-text-dark: var(--ref-palette-neutral10);
   --app-color-performance-sidebar-label-text-light: var(--ref-palette-neutral100);
-  --app-color-performance-sidebar-table-row-hover: #f0f3f9;
 
   /**
    * Colors for cards.