ui: modal-footer padding gone since latest scss cmpile

[fichtner]

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Describe the bug

d085f4ef36 introduced 0px padding for the modal footer making embedded buttons look stuck to the sides.

To Reproduce

Open any modal.

Expected behavior

Footer should be unaffected by the padding change (retain 15px).

Describe alternatives you considered

N/A

Screenshots

Relevant log files

N/A

Additional context

From 1c8639c:

 .modal-footer {
-  padding: 15px;
+  padding: 0px;
   text-align: right;
   border-top: 1px solid #e5e5e5;
 }

Environment

Current development branch.