Fix bulk edit unchecking in issues list refactor

With the `vue_issues_list` feature flag enabled,
when you select all issues then uncheck one issue,
all issues are unchecked which is incorrect behaviour.

This commit fixes this so that unchecking the one issue
only unselects that one issue.

app/assets/javascripts/vue_shared/components/filtered_search_bar/filtered_search_bar_root.vue

@@ -332,7 +332,7 @@ export default {
       v-if="showCheckbox"
       class="gl-align-self-center"
       :checked="checkboxChecked"
-      @input="$emit('checked-input', $event)"
+      @change="$emit('checked-input', $event)"
     >
       <span class="gl-sr-only">{{ __('Select all') }}</span>
     </gl-form-checkbox>

spec/features/issues/user_bulk_edits_issues_spec.rb

@@ -104,6 +104,26 @@ RSpec.describe 'Multiple issue updating from issues#index', :js do
     end
   end
 
+  describe 'select all issues' do
+    let!(:issue_2) { create(:issue, project: project) }
+
+    before do
+      stub_feature_flags(vue_issues_list: true)
+    end
+
+    it 'after selecting all issues, unchecking one issue only unselects that one issue' do
+      visit project_issues_path(project)
+
+      click_button 'Edit issues'
+      check 'Select all'
+      uncheck issue.title
+
+      expect(page).to have_unchecked_field 'Select all'
+      expect(page).to have_unchecked_field issue.title
+      expect(page).to have_checked_field issue_2.title
+    end
+  end
+
   def create_closed
     create(:issue, project: project, state: :closed)
   end