subscription page search field ui selector update (#1702)

* subscription page search field ui selector update

* implemented PF4 related comments

* use SearchableViewMixinPF4 instead of SubscriptionSearchableViewMixin in class SearchableViewMixinPF4

(cherry picked from commit 4441e8d)

airgun/views/subscription.py

@@ -10,27 +10,15 @@
 from widgetastic_patternfly import BreadCrumb, Button
 
 from airgun.exceptions import ReadOnlyWidgetError
-from airgun.views.common import BaseLoggedInView, SatTab, SearchableViewMixin
+from airgun.views.common import BaseLoggedInView, SatTab, SearchableViewMixinPF4
 from airgun.widgets import (
     ConfirmationDialog,
     ItemsListReadOnly,
     ProgressBar,
     SatTable,
-    Search,
 )
 
 
-# Search field and button on Subscriptions page uses different locators,
-# so subclass it and use it in our custom SearchableViewMixin
-class SubscriptionSearch(Search):
-    search_field = TextInput(locator=(".//input[starts-with(@id, 'downshift-')]"))
-    search_button = Button('Search')
-
-
-class SubscriptionSearchableViewMixin(SearchableViewMixin):
-    searchbox = SubscriptionSearch()
-
-
 class DeleteSubscriptionConfirmationDialog(ConfirmationDialog):
     confirm_dialog = Button('Delete')
     cancel_dialog = Button('Cancel')
@@ -115,7 +103,7 @@ def fill(self, values):
         self.close()
 
 
-class SubscriptionListView(BaseLoggedInView, SubscriptionSearchableViewMixin):
+class SubscriptionListView(BaseLoggedInView, SearchableViewMixinPF4):
     """List of all subscriptions."""
 
     table = SatSubscriptionsViewTable(