Add pane splitting by dragged item. Works, but the overlay doesn't clear quite right

styles/src/styleTree/tabBar.ts

@@ -75,10 +75,6 @@ export default function tabBar(colorScheme: ColorScheme) {
   return {
     height,
     background: background(layer),
-    dropTargetOverlayColor: withOpacity(
-      foreground(layer),
-      0.6
-    ),
     activePane: {
       activeTab: activePaneActiveTab,
       inactiveTab: tab,

styles/src/styleTree/workspace.ts

@@ -227,5 +227,9 @@ export default function workspace(colorScheme: ColorScheme) {
         shadow: colorScheme.modalShadow,
       },
     },
+    dropTargetOverlayColor: withOpacity(
+      foreground(layer),
+      0.6
+    ),
   };
 }