source/blender/editors/asset/intern/asset_shelf_catalog_selector.cc

@@ -85,6 +85,7 @@ class AssetCatalogSelectorTree : public ui::AbstractTreeView {
           catalog_path_enabled_(
               settings_is_catalog_path_enabled(shelf_settings, catalog_item.catalog_path()))
     {
+      disable_activatable();
     }
 
     bool is_catalog_path_enabled() const

source/blender/editors/include/UI_abstract_view.hh

@@ -127,6 +127,7 @@ class AbstractViewItem {
    * If this wasn't done, the behavior of items is undefined.
    */
   AbstractView *view_ = nullptr;
+  bool is_activatable_ = true;
   bool is_interactive_ = true;
   bool is_active_ = false;
   bool is_renaming_ = false;
@@ -177,6 +178,7 @@ class AbstractViewItem {
   void disable_interaction();
   bool is_interactive() const;
 
+  void disable_activatable();
   /**
    * Requires the view to have completed reconstruction, see #is_reconstructed(). Otherwise we
    * can't be sure about the item state.

source/blender/editors/interface/interface_handlers.cc

@@ -11329,6 +11329,10 @@ static int ui_handle_menus_recursive(bContext *C,
     }
   }
 
+  if (!menu->retvalue) {
+    ui_handle_viewlist_items_hover(event, menu->region);
+  }
+
   if (do_towards_reinit) {
     ui_mouse_motion_towards_reinit(menu, event->xy);
   }

source/blender/editors/interface/views/abstract_view_item.cc

@@ -209,6 +209,11 @@ void AbstractViewItem::disable_interaction()
   is_interactive_ = false;
 }
 
+void AbstractViewItem::disable_activatable()
+{
+  is_activatable_ = false;
+}
+
 bool AbstractViewItem::is_interactive() const
 {
   return is_interactive_;

source/blender/editors/interface/views/grid_view.cc

@@ -158,6 +158,9 @@ void AbstractGridViewItem::activate()
   BLI_assert_msg(get_view().is_reconstructed(),
                  "Item activation can't be done until reconstruction is completed");
 
+  if (!is_activatable_) {
+    return;
+  }
   if (is_active()) {
     return;
   }

source/blender/editors/interface/views/tree_view.cc

@@ -293,6 +293,9 @@ void AbstractTreeViewItem::activate()
   BLI_assert_msg(get_tree_view().is_reconstructed(),
                  "Item activation can't be done until reconstruction is completed");
 
+  if (!is_activatable_) {
+    return;
+  }
   if (is_active()) {
     return;
   }
@@ -462,14 +465,16 @@ void TreeViewLayoutBuilder::build_row(AbstractTreeViewItem &item) const
     uiLayoutSetActive(overlap, false);
   }
 
-  uiLayoutRow(overlap, false);
+  uiLayout *row = uiLayoutRow(overlap, false);
+  /* Enable emboss for item mouse hover highlight. */
+  uiLayoutSetEmboss(row, UI_EMBOSS);
   /* Every item gets one! Other buttons can be overlapped on top. */
   item.add_treerow_button(block_);
 
   /* After adding tree-row button (would disable hover highlighting). */
   UI_block_emboss_set(&block_, UI_EMBOSS_NONE);
 
-  uiLayout *row = uiLayoutRow(overlap, true);
+  row = uiLayoutRow(overlap, true);
   item.add_indent(*row);
   item.add_collapse_chevron(block_);