Delete widget shortcut

When configuring a layout, keyboard shortcut is available to delete a widget

AC

• suppr / cmd + backspace (mac) on a selected widget => delete it

• Analytics event is sent when pressing the shortcut
  • Category: Described according to NXS-5742
  • Event: Widget delete
  • Label: [Widget name]
  • Value: 1
    (goal: usage stats and understand work flow)
    (value: when done using UI = 0, keyboard = 1 => allows us to measure adoption for keyboard shortcuts)