Allow to remove the selected history entry in Prediction ListView

[Ergamon]

Prerequisites

• Write a descriptive title.

Description of the new feature/enhancement

I am now working for a few days with 2.2.0 beta4 and this new prediction style is a huge productivity booster.

If you are working for long time with PowerShell there is also a lot of garbage in your history. I know you can clear it completly, but I would like to conveniently remove single entries.

I know I can start some manipulation on the history file, but I would prefer to be able to do this while the popup is open.

Proposed technical implementation details (optional)

While the ListView is active, allow a hotkey to be pressed for deleting the selected entry.

Not sure if the DELETE character is a good choice or maybe SHIFT-DELETE

[daxian-dbw]

Close as a dup of #1778