Add fyne.Do to t.TextGrid.Refresh. Prevents loop scrolling on term resize.

[figuerom16]

This seems to fix issues with resizing causing lag and text to loop and haven't been able to generate an out of bounds issue with Fyne.Do being added.

[figuerom16]

This seems to fix the same issue as #121. Not sure if one or the other is the better fix or if both are needed.

[nagylzs]

Please correct me if I'm wrong, but AFAIK, all BaseWidget (and CanvasObject) methods must be called from the main fyne thread. TextGrid implements BaseWidget, so TextGrid.Refresh must be called from the main fyne thread.

This commit:

30e28c2

hides the problem when TextGrid.Refresh is not called from the main fyne thread; but it does not fix it. The real fix would be to find out which code calls TextGrid.Refresh directly from another thread.

Please forgive me if I write something stupid, I'm new to this.

[figuerom16]

I see. It's the opposite of what I was thinking then.

[andydotxyz]

This commit: 30e28c2 hides the problem when TextGrid.Refresh is not called from the main fyne thread; but it does not fix it. The real fix would be to find out which code calls TextGrid.Refresh directly from another thread.

Correct