restrict transition on form.default inputs, fixes #5202

Closes #5202

Merge request !3885

resources/assets/stylesheets/scss/forms.scss

@@ -48,7 +48,8 @@ form.default {
         padding: 5px;
         vertical-align: middle;
         width: 100%;
-        transition: all var(--transition-duration) ease-out;
+        transition: background-color var(--transition-duration) ease-out,
+                    border-color var(--transition-duration) ease-out;
 
         &:focus {
             border-color: var(--brand-color-dark);