Issue #3161023 by pivica: Form outline is almost touching description

themes/bs_bootstrap/sass/components/partials/_forms.scss

@@ -146,10 +146,12 @@ label {
   }
 }
 
-// Description element - usually used for form descriptions.
+// Description element - usually used for form descriptions. In Bootstrap this
+// is a form-text CSS class, however we keep Drupal description CSS class.
 .description {
   color: $text-muted;
   font-size: $font-size-sm;
+  line-height: $form-text-line-height;
 
   &--before {
     margin-bottom: $form-text-margin-top;

themes/bs_bootstrap/sass/variables/_bs_bootstrap.scss

@@ -64,7 +64,8 @@ $input-padding-y:           $input-btn-padding-y !default;
 // overriding of default browser behavior.
 $input-autofill-bg:         $input-bg !default;
 
-$form-text-margin-top:      .1rem !default;
+$form-text-line-height:     1.3 !default;
+$form-text-margin-top:      .3rem !default;
 $form-inline-group-gutter:  2*$spacer !default;
 
 // Custom checkbox/radio and select controls should look the same like other