Moving style back to index.css

src/application/dockpanel.css

@@ -51,8 +51,3 @@
 #jp-main-dock-panel {
   padding: 8px;
 }
-
-
-body {
-  background: var(--jp-layout-color3);
-}

src/application/index.css

@@ -17,6 +17,7 @@ body {
   padding: 0;
   overflow: hidden;
   font-family: sans-serif;
+  background: var(--jp-layout-color3);
 }