Fixed theme uploader UI bug

- added max height to theme uploader modal container to avoid long list of errors leaning out of screen
- added shadow on top of footer to indicate long list of errors

ghost/admin/app/components/modal-upload-theme.hbs

@@ -112,7 +112,7 @@
     </div>
 </div>
 
-<div class="modal-footer">
+<div class="modal-footer {{if (and this.theme this.hasWarningsOrErrors) "top-shadow"}}">
     <div class="flex items-center justify-between {{if (or this.displayOverwriteWarning this.canActivateTheme this.validationErrors this.fatalValidationErrors) "flex-auto"}}">
         <button {{action "closeModal"}} disabled={{this.closeDisabled}} class="gh-btn" data-test-close-button>
             <span>{{#if this.theme}}Close{{else}}Cancel{{/if}}</span>

ghost/admin/app/styles/components/modals.css

@@ -87,13 +87,15 @@
     padding: 0 32px;
 }
 
-.fullscreen-modal-body-scrolling .modal-footer {
+.fullscreen-modal-body-scrolling .modal-footer,
+.modal-footer.top-shadow {
     position: relative;
     margin: 20px -32px 0;
     padding: 0 32px;
 }
 
-.fullscreen-modal-body-scrolling .modal-footer:before {
+.fullscreen-modal-body-scrolling .modal-footer:before,
+.modal-footer.top-shadow:before {
     position: absolute;
     content: "";
     top: -20px;
@@ -104,6 +106,11 @@
     box-shadow: 0 -0.3px 1px rgb(0 0 0 / 3%), 0 -4px 7px rgb(0 0 0 / 6%);
 }
 
+.modal-footer.top-shadow:before {
+    left: 0;
+    right: 0;
+}
+
 
 /* The modal
 /* ---------------------------------------------------------- */
@@ -134,8 +141,8 @@
 
 .modal-content .close {
     position: absolute;
-    top: 19px;
-    right: 19px;
+    top: 16px;
+    right: 16px;
     z-index: 9999;
     margin: 0;
     padding: 0;

ghost/admin/app/styles/layouts/settings.css

@@ -981,6 +981,13 @@
     overflow-y: auto;
     margin: -32px -32px 0;
     padding: 32px 32px 0;
+    max-height: calc(100vh - 20vw);
+}
+
+@media (max-height: 960px) {
+    .theme-validation-container {
+        max-height: calc(100vh - 180px);
+    }
 }
 
 .theme-validation-item {