Text area doesn't keep focus when the window loses focus

[Klondike]

If the focus is in the main code text area, and I give focus to another window (Alt+Tab or otherwise), and then give HacketyHack? focus again, the text area's focus has been lost, and I have to use my mouse to click on the text area to regain it (tabbing with the keyboard won't work, actually).

This is minor, but retaining focus of components is standard for Windows apps, and makes the app friendlier to use when multitasking -- which a lesson-following user may well be.