Apply snapshot instead of reloading table in SiteStatsInsightsTableVi…

…ewController

WordPress/Classes/ViewRelated/Stats/Insights/SiteStatsInsightsTableViewController.swift

@@ -52,7 +52,20 @@ class SiteStatsInsightsTableViewController: SiteStatsBaseTableViewController, St
     private let analyticsTracker = BottomScrollAnalyticsTracker()
 
     private lazy var tableHandler: ImmuTableViewHandler = {
-        return ImmuTableViewHandler(takeOver: self, with: analyticsTracker)
+        let handler = ImmuTableViewHandler(takeOver: self, with: analyticsTracker)
+        handler.automaticallyReloadTableView = false
+        tableView.dataSource = dataSource
+        tableView.delegate = self // TODO
+        return handler
+    }()
+
+    private lazy var dataSource: StatsInsightsDataSource = {
+        return StatsInsightsDataSource(tableView: tableView) { tableView, indexPath, item in
+            let row = item.immuTableRow
+            let cell = tableView.dequeueReusableCell(withIdentifier: row.reusableIdentifier, for: indexPath)
+            row.configureCell(cell)
+            return cell
+        }
     }()
 
     // MARK: - View
@@ -166,7 +179,7 @@ private extension SiteStatsInsightsTableViewController {
             return
         }
 
-        tableHandler.viewModel = viewModel.tableViewModel()
+        dataSource.apply(viewModel.tableViewSnapshot(), animatingDifferences: false)
 
         if viewModel.fetchingFailed() {
             displayFailureViewIfNecessary()