    /** * @class Ext.MessageBox */ .x-msgbox {    min-width: 15em;    max-width: 20em;    max-height: 90%;     // to hide content that is too large (vertically)     .x-docking-vertical {        overflow: hidden;    }} // This will need to be generalized at some point .x-ie {    .x-msgbox {        .x-dock.x-dock-horizontal.x-unsized {            > .x-dock-body {               @include st-box-flex(1, 0px);            }        }    }}  .x-msgbox-buttons {    .x-button {        min-width: 4.5em;    }}