bug #6238 Fix vertical scrollbar (Seb33300)

This PR was merged into the 4.x branch.

Discussion
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Fix vertical scrollbar

Hide the vertical scrollbar if unnecessary.

![image](https://github.com/EasyCorp/EasyAdminBundle/assets/915273/a87721cd-ee59-4a12-8d46-bf0addba0ab3)

Commits
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352015a Fix vertical scrollbar

assets/css/easyadmin-theme/base.css

@@ -315,7 +315,7 @@ a.user-menu-wrapper .user-details:hover {
 }
 
 #content-resizer-handler {
-    min-height: calc(100vh - 56px);
+    min-height: calc(100vh - 56px - 45px);
 }
 
 .content-top {
@@ -332,6 +332,7 @@ a.user-menu-wrapper .user-details:hover {
 @media(min-width: 992px) {
     .content-top {
         display: flex;
+        margin-bottom: 0;
         height: 56px;
         justify-content: space-between;
         padding: 11px calc(var(--lg-content-padding-right) + var(--resize-handler-width)) 11px var(--lg-content-padding-left);