For #2570: Hide 3-dots menu for all library items when in select mode. (#6736)

notifyDataSetChanged to avoid not displayed but created items not being redrawn

app/src/main/java/org/mozilla/fenix/library/LibraryPageView.kt

@@ -30,8 +30,7 @@ open class LibraryPageView(
             foregroundColor = context.getColorFromAttr(R.attr.primaryText),
             backgroundColor = context.getColorFromAttr(R.attr.foundation)
         )
-        libraryItemsList.setItemViewCacheSize(0)
-        libraryItemsList.adapter?.notifyItemRangeChanged(0, libraryItemsList.childCount)
+        libraryItemsList.adapter?.notifyDataSetChanged()
     }
 
     protected fun setUiForSelectingMode(
@@ -43,8 +42,7 @@ open class LibraryPageView(
             foregroundColor = ContextCompat.getColor(context, R.color.white_color),
             backgroundColor = context.getColorFromAttr(R.attr.accentHighContrast)
         )
-        libraryItemsList.setItemViewCacheSize(0)
-        libraryItemsList.adapter?.notifyItemRangeChanged(0, libraryItemsList.childCount)
+        libraryItemsList.adapter?.notifyDataSetChanged()
     }
 
     private fun updateToolbar(title: String?, foregroundColor: Int, backgroundColor: Int) {