129964: Restored language button border on focus

src/app/shared/lang-switch/lang-switch.component.html

@@ -1,7 +1,7 @@
 <div ngbDropdown class="navbar-nav" *ngIf="moreThanOneLanguage" display="dynamic" placement="bottom-right">
   <button role="button"
           [attr.aria-label]="'nav.language' |translate"
-          [title]="'nav.language' | translate" class="dropdown-toggle px-1"
+          [title]="'nav.language' | translate" class="dropdown-toggle btn btn-link px-1"
           (click)="$event.preventDefault()" data-toggle="dropdown" ngbDropdownToggle
           tabindex="0">
     <i class="fas fa-globe-asia fa-lg fa-fw"></i>

src/app/shared/lang-switch/lang-switch.component.scss

@@ -3,7 +3,6 @@
 }
 
 .dropdown-toggle {
-  all: unset;
   color: var(--ds-header-icon-color);
 
   &:hover, &:focus {