[PyQt] QGridLayout and stretching widgets when maximized

[malonn]

I figured it out. When I wrote this, I forgot there was an extra, empty column at the end of the grid. By making my widgets span that empty column, and setting the stretch (as I correctly understood it), all is good.

Qt works as expected. Or should as I say as I understand it to. If there is a fault, it will be in my understanding.