Move lines up/down does not work correctly

[ChrisSchneebauer]

Hi, we're using RIDE v2.0b1 with Python 3.8.10, Windows.

Problem is, when selecting a line in the editor and moving the line with SHIFT-ALT-UP (or DOWN), the line can only be moved one line. Because the focus remains on the originally selected line.

This seems to be similar to an old issue: #767

Also occurs with current master (v2.0b2.dev3).