Web Scraper version: 0.3.7
Chrome version: any
Steps to reproduce:
-create any sitemap with any selectors
-click 'add new selector'
-while having selector window opened, click any item in sitemap menu list (for example, 'selectors')
-it will result in an empty selector in a sitemap
note: when reproduced several times, it will leave only one empty selector in sitemap.