"Restore from trash" should not be selectable when no items are selected

Version information

Thunar 4.20.3

Steps to reproduce

1. double-click the trash (which should open it in a Thunar window)

Current behavior

Even when no item in the trash is selected (or even when the trash is empty) the "restore selected items" button on the lower left is clickable

Expected outcome

As long as no items in trash are selected, that button should be visibly and technically inactive (just as the empty trash button to its right is when the trash is empty).