updated nhsuk-u-margin-top-3 to nhsuk-u-padding-top-3 to remove grey space

Author: binon

Views/Shared/_CookieConsentPartial.cshtml

@@ -16,7 +16,7 @@
 @if (showCookieBanner == null && validateCookieBannerViaTempData == null) // [BY] Show cookie banner when the value is null. if the user consent yes or no then we dont display the banner
 {
     <div id="nhsuk-cookie-banner">
-        <div class="nhsuk-cookie-banner  nhsuk-u-margin-top-3" id="cookiebanner">
+        <div class="nhsuk-cookie-banner  nhsuk-u-padding-top-3" id="cookiebanner">
             <div class="nhsuk-width-container ">
                 <h2>Cookies on the @cookieBannerAppName</h2>
                 @cookieBannerContent                
@@ -34,7 +34,7 @@
             </div>
         </div>
 
-        <div class="nhsuk-success-banner  nhsuk-u-margin-top-3" id="nhsuk-cookie-confirmation-banner" style="display:none;">
+        <div class="nhsuk-success-banner  nhsuk-u-padding-top-3" id="nhsuk-cookie-confirmation-banner" style="display:none;">
             <div class="nhsuk-width-container">
                 <p id="nhsuk-success-banner__message">You can change your cookie settings at any time using our <a href="@Url.Action(policyActionName,policyControllerName)">cookies page</a>.</p>
             </div>
@@ -43,7 +43,7 @@
 }
 @if (consentViaBannerPostTemp != null)
 {
-    <div class="nhsuk-success-banner  nhsuk-u-margin-top-3" id="nhsuk-cookie-confirmation-banner-post">
+    <div class="nhsuk-success-banner  nhsuk-u-padding-top-3" id="nhsuk-cookie-confirmation-banner-post">
         <div class="nhsuk-width-container">
             <p id="nhsuk-success-banner__message">You can change your cookie settings at any time using our <a href="@Url.Action(policyActionName,policyControllerName)">cookies page</a>.</p>
         </div>