missing classes from custom modal css

[dissimulate]

when picking only the modal in the customize menu, it does not contain the following:

.fade {
opacity: 0;
-webkit-transition: opacity 0.15s linear;
-moz-transition: opacity 0.15s linear;
-o-transition: opacity 0.15s linear;
transition: opacity 0.15s linear;
}

.fade.in {
opacity: 1;
}

which is needed for it to work.

[mdo]

This is related to another issue about dependencies in the Customizer. Going to close as a dupe for this—for now, include the component animations file.