chore: slow loading animation a little more

Author: ghiscoding

packages/multiple-select-vanilla/src/styles/_variables.scss

@@ -79,7 +79,7 @@ $ms-label-text-padding-left: 8px !default;
 $ms-loading-gap: 4px !default;
 $ms-loading-icon-size: 1.15em !default;
 $ms-loading-padding: 0.6rem 8px !default;
-$ms-loading-spin-animation: 1s infinite linear !default;
+$ms-loading-spin-animation: 1.5s infinite linear !default;
 $ms-option-highlight-bg-color: rgba($ms-primary-color, 8%) !default;
 $ms-ok-button-bg-color: #fff !default;
 $ms-ok-button-bg-hover-color: #f9f9f9 !default;
@@ -149,4 +149,4 @@ $ms-select-all-text-hover-color: transparent !default;
     --ms-select-all-border-bottom: 1px solid #5d5d5d;
     --ms-select-all-text-color: #fff;
     --ms-select-all-text-font-weight: bold;
-}
+}