Allow creating label lists with the same label name

app/assets/javascripts/boards/components/new_list_dropdown.js

@@ -37,7 +37,7 @@ export default function initNewListDropdown() {
         });
       },
       renderRow(label) {
-        const active = boardsStore.findList('title', label.title);
+        const active = boardsStore.findListByLabelId(label.id);
         const $li = $('<li />');
         const $a = $('<a />', {
           class: active ? `is-active js-board-list-${active.id}` : '',
@@ -63,7 +63,7 @@ export default function initNewListDropdown() {
         const label = options.selectedObj;
         e.preventDefault();
 
-        if (!boardsStore.findList('title', label.title)) {
+        if (!boardsStore.findListByLabelId(label.id)) {
           boardsStore.new({
             title: label.title,
             position: boardsStore.state.lists.length - 2,

app/assets/javascripts/boards/stores/boards_store.js

@@ -166,6 +166,11 @@ const boardsStore = {
     });
     return filteredList[0];
   },
+  findListByLabelId(id) {
+    return this.state.lists.find(list => {
+      return list.type === 'label' && list.label.id === id;
+    });
+  },
   updateFiltersUrl() {
     window.history.pushState(null, null, `?${this.filter.path}`);
   },