Description

When you create a legend widget, the legend preview is not available in the wizard. Saving the widget works correctly. Editing again the widget do not show the preview.

In case of Bug (otherwise remove this paragraph)

Browser Affected
any

Steps to reproduce

• Login
• Create a new dashboard
• Add a map widget selecting from catalog a map (tested with WFS Test Map on dev) and save it in the dashboard
• start creating a legend widget

Expected Result

• I can see the legend perview (see image below)
  

Current Result

• Can not see the preview

Other useful information (optional):

Note sometimes it randomly works so try many times editing or refreshing existing dashboard to reproduce the problem.