[3.x Port] Configurable MessageBox minWidth

[Jako]

What does it do?

Make the minWidth of MODx.Msg.confirm configurable

Why is it needed?

The current confirm method of MODx.Msg uses the default Ext.MessageBox.minWidth set a few lines above.

How to test

Set the minWidth property of MODx.confirm to a value and open+close and reopen the confirm box again. Without the minWidth property, the reopened box is too small, since the size is only calculated on the first display (which is a second issue – but thats inside of Ext JS).

Related issue(s)/PR(s)

#15984, 3.x Port of #15995

[Mark-H]

Documentation updated pending for when this is merged: modxorg/Docs#385

Tested and confirmed working by running the following in the console:

MODx.msg.confirm({
   title: 'Are you sure?',
   text: 'Do you want to delete the world? This is irreversible.',
   minWidth: 500,
   listeners: {
        'success':{fn: function(r) {
             MODx.clearCache(); /* clear cache after world destruction, so we dont have latent data */
        },scope:true}
   }
});