Merge pull request #1347 from ethereum/patchfilepanel

apps/remix-ide/src/app/panels/file-panel.js

@@ -105,7 +105,7 @@ module.exports = class Filepanel extends ViewPlugin {
     if (!item.name || !item.id) throw new Error('Item name and id is mandatory')
     if (!item.type && !item.path && !item.extension && !item.pattern) throw new Error('Invalid file matching criteria provided')
     if (this.registeredMenuItems.filter((o) => {
-      return o.id === item.id & o.name === item.name
+      return o.id === item.id && o.name === item.name
     }).length) throw new Error(`Action ${item.name} already exists on ${item.id}`)
     this.registeredMenuItems = [...this.registeredMenuItems, item]
     this.removedMenuItems = this.removedMenuItems.filter(menuItem => item.id !== menuItem.id)