Fixed modal lists dropdown not updating when list is deleted

app/assets/javascripts/boards/boards_bundle.js.es6

@@ -71,10 +71,6 @@ $(() => {
 
           Store.addBlankState();
           this.loading = false;
-
-          if (this.state.lists.length > 0) {
-            ModalStore.store.selectedList = this.state.lists[0];
-          }
         });
     }
   });

app/assets/javascripts/boards/components/modal/lists_dropdown.js.es6

@@ -11,9 +11,12 @@
     },
     computed: {
       selected() {
-        return this.modal.selectedList;
+        return this.modal.selectedList || this.state.lists[0];
       },
     },
+    destroyed() {
+      this.modal.selectedList = null;
+    },
     template: `
       <div class="dropdown inline">
         <button

app/assets/javascripts/boards/stores/modal_store.js.es6

@@ -11,7 +11,7 @@
         selectedIssues: [],
         showAddIssuesModal: false,
         activeTab: 'all',
-        selectedList: {},
+        selectedList: null,
         searchTerm: '',
         loading: false,
         loadingNewPage: false,

spec/features/boards/add_issues_modal_spec.rb

@@ -76,6 +76,27 @@ describe 'Issue Boards add issue modal', :feature, :js do
       end
     end
 
+    context 'list dropdown' do
+      it 'resets after deleting list' do
+        page.within('.add-issues-modal') do
+          expect(find('.add-issues-footer')).to have_button(planning.title)
+
+          click_button 'Cancel'
+        end
+
+        first('.board-delete').click
+
+        click_button('Add issues')
+
+        wait_for_vue_resource
+
+        page.within('.add-issues-modal') do
+          expect(find('.add-issues-footer')).not_to have_button(planning.title)
+          expect(find('.add-issues-footer')).to have_button(label.title)
+        end
+      end
+    end
+
     context 'search' do
       it 'returns issues' do
         page.within('.add-issues-modal') do