SI-3231 fix full width button

https://openkonsequenz.atlassian.net/browse/SI-3231

projects/grid-failure-information-app/src/app/pages/grid-failure/grid-failure-details/grid-failure-details.component.html

@@ -576,7 +576,7 @@
                   <button
                     #postSelectedStationButton
                     type="button"
-                    class="btn btn-primary btn-sm"
+                    class="btn btn-primary btn-sm w-auto"
                     (click)="gridFailureDetailsSandbox.postSelectedStation(); clearSearchInput()"
                     [disabled]="gridFailureDetailsSandbox.oldVersion || formState.isDisabled"
                   >