Make redirects after actions the way user would expect

When user deleted an object/container, she was always redirected
to the list of all containers, but this brings bad UX. Fixed by
redirecting user to the parent page of the element that she just
deleted - just like she would have expected.

BZ: https://bugzilla.redhat.com/show_bug.cgi?id=1444078

Signed-off-by: Miha Pleško <miha.plesko@xlab.si>

app/controllers/cloud_object_store_container_controller.rb

@@ -19,10 +19,9 @@ def button
 
     process_cloud_object_storage_buttons(params[:pressed])
 
-    if !@flash_array.nil? && params[:pressed].ends_with?("delete")
-      javascript_redirect :action      => 'show_list',
-                          :flash_msg   => @flash_array[0][:message],
-                          :flash_error => @flash_array[0][:level] == :error
+    if !@flash_array.nil? && params[:pressed].ends_with?("delete") && @display != "cloud_object_store_objects"
+      session[:flash_msgs] = @flash_array.dup
+      javascript_redirect previous_breadcrumb_url
     elsif !@flash_array.nil?
       render_flash unless performed?
     end

app/controllers/cloud_object_store_object_controller.rb

@@ -18,9 +18,8 @@ def button
     process_cloud_object_storage_buttons(params[:pressed])
 
     if !@flash_array.nil? && params[:pressed].ends_with?("delete")
-      javascript_redirect :action      => 'show_list',
-                          :flash_msg   => @flash_array[0][:message],
-                          :flash_error => @flash_array[0][:level] == :error
+      session[:flash_msgs] = @flash_array.dup
+      javascript_redirect previous_breadcrumb_url
     elsif !@flash_array.nil?
       render_flash unless performed?
     end