Corrected a lot of small misuses of the new flex model.
fab css
Updated alignment widget example.
Automatic width adjustment for flex0
fab css
Change stretch to flex-start
fab css
Revert "fab css"

This reverts commit a45a2c0f2ae26e7b731dc54965a6b224a39454b4.
Revert "Change stretch to flex-start"

This reverts commit 774073116dd4195037c452d48f05b432bba38801.
Align-start widget subarea
fab css
output_scroll can't be a vbox.
fab css
Updated alignment example.
Added align-start to widget container.
fab css
Fix incorrect usage of attrs
Revert "Fix incorrect usage of attrs"

This reverts commit 04aa0885bb143fd0409fe133ca572004ffa6dc0e.
Let backbone get changed attrs
Revert "Let backbone get changed attrs"

This reverts commit 4dd4990ff146508894353e390601c659d2638ed3.