Regions now require width to render properly

[tangix]

Moving a prototype project from 4.0.7 to 4.1-pr1 and I found the following difference causing my to change some code (to the better...)

4.0.7 lets me get away with the following definition of a Border region:

{
    xtype: 'navtree',
    region: 'west',
    split: true,
    minWidth: 250              
}

With 4.1-pr1 I need to specifically add a width: property otherwise the west region will be 100% width.

[mitchellsimoens]

Using this code:

Ext.create('Ext.container.Viewport', {
    layout : 'border',
    items  : [
        {
            region : 'west',
            split  : true
        },
        {
            region : 'center'
        }
    ]
});

Both 4.0.7, 4.1-PR1, and out latest code in git produce the same results.

Using this code in 3.4.0 and it produces the same results as the 4.x did:

new Ext.Viewport({
    layout : 'border',
    items  : [
        {
            region : 'west',
            split  : true
        },
        {
            region : 'center'
        }
    ]
});

[dongryphon]

Moving a prototype project from 4.0.7 to 4.1-pr1 and I found the following difference causing my to change some code (to the better...)

4.0.7 lets me get away with the following definition of a Border region:

{
    xtype: 'navtree',
    region: 'west',
    split: true,
    minWidth: 250              
}

With 4.1-pr1 I need to specifically add a width: property otherwise the west region will be 100% width.

Perhaps a complete example would help, but I'll take a stab. The meaning of no width is "auto width" which can be counter-intuitive at times. The navtree is not a built-in xtype, so I am not sure what it contains. If you try something like a simple panel with some text or a basic component, I imagine that it will auto-width as you might expect. Trees, being tables, may expand.

[tangix]

navtree is (as you may have guessed) a subclassed Tree panel.
I have added "width" and now everything works in both 4.0.7 and 4.1-PR1... don't know why. If I remove "width" everything is fine now, but I have added other stuff to the panels so maybe the layout is now completely satisfied?

Thanks,
/Mattias