Fix iPad Explore screen not restoring search state

Tusker/Screens/Explore/InlineTrendsViewController.swift

@@ -77,3 +77,13 @@ class InlineTrendsViewController: UIViewController {
     }
     
 }
+
+extension InlineTrendsViewController: StateRestorableViewController {
+    func stateRestorationActivity() -> NSUserActivity? {
+        if searchController.isActive {
+            return UserActivityManager.searchActivity(query: searchController.searchBar.text, accountID: mastodonController.accountInfo!.id)
+        } else {
+            return nil
+        }
+    }
+}