Reset last search on resetting questions

app/src/main/java/eu/faircode/email/FragmentOptionsMisc.java

@@ -92,6 +92,7 @@ public class FragmentOptionsMisc extends FragmentBase implements SharedPreferenc
             "crash_reports_asked", "review_asked", "review_later", "why",
             "reply_hint", "html_always_images", "print_html_confirmed",
             "selected_folders", "move_1_confirmed", "move_n_confirmed",
+            "last_search",
             "identities_asked", "cc_bcc", "inline_image_hint", "compose_reference", "send_dialog",
             "setup_reminder", "setup_advanced"
     };

app/src/main/java/eu/faircode/email/WorkerCleanup.java

@@ -112,9 +112,6 @@ public class WorkerCleanup extends Worker {
 
                 ServiceSynchronize.reschedule(context);
 
-                // Clear last search
-                prefs.edit().remove("last_search").apply();
-
                 // Contact info cache
                 ContactInfo.clearCache();
             }