Cannot select text using CTRL-A in some text boxes

nescafe

As mentioned earlier here: http://forum.linqpad.net/discussion/comment/1926/#Comment_1926

I also noticed that the "Additional connection string parameters" textbox doesn't allow the text to be selected using CTRL-A hotkey.

This is also the case in the 'Additional Namespace Imports' (F4) textbox. CTRL-A simply doesn't work.

LINQPad v5.02.05 / Windows 10