Bug 877166 - [SMS][Regression] Delete button is not disabled when no item is selected
Merge pull request #10123 from huchengtw-moz/sms/Bug_877166_Delete_button_is_not_disabled_when_no_item_is_selected

Bug 877166 - [SMS][Regression] Delete button is not disabled when no item is selected. r=steveck-chung