Investigate background changes in Shoes 3

[jasonrclark]

From the mailing list... see whether changes related to shoes/shoes3#355 should cause updates in Shoes 4.

@ccoupe referenced seeing two bugs in trying to run this sample program on Shoes 4:

Shoes.app(title: " v1.0", width: 300, height: 500, resizable: true ) do
     background green
     @main = stack left: 0.05, top: 0.15, width: 0.9, height: 0.8,
scroll: true do
         background beige
         100.times do |i|
             para "#{i+1} times"
         end
     end
end

I'm betting one of them is the fact it doesn't scroll since that's a long-standing thing we haven't gotten quite implemented yet. @ccoupe, other details you'd care to fill in about the other bad behavior you're seeing?

[ccoupe]

Correct. If you resize small a scroll bar does appear but it's not sized and the range is limited.

FWIW, Shoes 3.3.3 will recognize a scroll: true argument to background and moves the background with the contents scrolling. . Otherwise you get the traditional/old/correct-for-many behavior.