Inline example preview height is sometimes not enough

[nene]

In some cases the code is just one line, but preview should have a bit more height.

For example: http://docs.sencha.com/ext-js/4-0/#!/api/Ext.window.MessageBox

Maybe there should be an option to specify the height of the preview. It's clear that one can't automatically guess the best height.

Another good example is the TimePicker, which needs to be even higher: http://docs.sencha.com/ext-js/4-0/#!/api/Ext.picker.Time