TextEdit: Cannot use 'Delete' key in line edits on OS X

Steps to reproduce:

• open/create a Qt Quick Application/UI, switch to Design
• select an Item with a line edit with free text (Text's text property, ApplicationWindow's title or similar)
• place the cursor into the respective line edit and hit 'Delete'

Current behavior:

• nothing happens (Backspace still works as expected)

Expected behavior:

• 'Delete' key works as well (as it does on Linux/Win)