fix(CMultiSelect): set proper small variant size

Author: mrholek

scss/_variables.scss

@@ -1292,7 +1292,7 @@ $form-multi-select-selection-tags-padding-y-sm:  .0675rem !default;
 $form-multi-select-selection-tags-padding-x-sm:  .0675rem !default;
 $form-multi-select-tag-margin-y-sm:              .0675rem !default;
 $form-multi-select-tag-margin-x-sm:              .0675rem !default;
-$form-multi-select-tag-padding-y-sm:             subtract(($form-multi-select-padding-y-sm - $form-multi-select-selection-tags-padding-y-sm - $form-multi-select-tag-margin-y-sm), $form-multi-select-tag-border-width) !default;
+$form-multi-select-tag-padding-y-sm:             0 !default;
 $form-multi-select-tag-padding-x-sm:             .5rem !default;
 // scss-docs-end form-multi-select-variables
 

scss/forms/_form-multi-select.scss

@@ -123,7 +123,7 @@
 }
 
 .form-multi-select-selection-tags {
-  min-height: add(($form-multi-select-padding-y * 2) + ($form-multi-select-font-size * $form-multi-select-line-height), ($form-multi-select-border-width * 2));
+  min-height: add(($form-multi-select-padding-y * 2), ($form-multi-select-font-size * $form-multi-select-line-height), ($form-multi-select-border-width * 2));
   padding: var(--#{$prefix}form-multi-select-selection-tags-padding-y) var(--#{$prefix}form-multi-select-selection-tags-padding-x);
   @include ltr-rtl("padding-right", var(--#{$prefix}form-multi-select-indicator-padding));
 
@@ -345,10 +345,10 @@
   --#{$prefix}form-multi-select-tag-margin-x: #{$form-multi-select-tag-margin-x-sm};
 
   &.form-multi-select-selection-tags {
-    min-height: add(($form-multi-select-padding-y-sm * 2) + ($form-multi-select-font-size-sm * $form-multi-select-line-height), ($form-multi-select-border-width * 2));
+    min-height: add(($form-multi-select-padding-y-sm * 2), ($form-multi-select-font-size-sm * $form-multi-select-line-height), ($form-multi-select-border-width * 2));
 
     .form-multi-select-search {
-      height: ($form-multi-select-padding-y-sm - $form-multi-select-selection-tags-padding-y-sm) * 2 + ($form-multi-select-font-size-sm * $form-multi-select-line-height);
+      height: subtract(($form-multi-select-padding-y-sm - $form-multi-select-selection-tags-padding-y-sm) * 2 + ($form-multi-select-font-size-sm * $form-multi-select-line-height), ($form-multi-select-border-width * 2));
     }
   }
 }