extjs-window-ui seems to work only partly for Ext.window.MessageBox

[thecap]

Hi,

i am trying to use the extjs-window-ui-mixin for this: Ext.window.MessageBox.

But I am only able to make it work for: $ui-border-radius for example.

Especially the Variable: $ui-header-padding does not work in any way. It isn't compiled.
That's why the padding for this header is 0 which looks very bad.

Do I have to use this parameter together with any other special config or something else like that?

[thecap]

Sudedenly it worked. After switching some variables with each other or something else like that, the header padding was assinged correctly.