In the filter panel, hitting the backspace button in a list filter value input removes the filter

Steps to reproduce

• Activate the filter panel
• Add filter on a List property (eg Category in the Live Data present in page Panels.WebHome)
• Select constraint Contains
• Filter on one property value
• In the filter value input, hit the backspace button

Actual result

The filter is removed from the filter panel.

Expected result

The filter remains present and the backspace button removes the caracters next to cursor when the constraint is Contains or Starts with, and clears the value when the constraint is Equals.