Ticket #50682: 50682.diff

src/wp-admin/css/themes.css

@@ -459 +459 @@
 }
 
 .theme-overlay .theme-wrap {
-        clear: both;
-        position: fixed;
-        top: 9%;
-        left: 190px;
-        right: 30px;
-        bottom: 3%;
-        background: #fff;
-        box-shadow: 0 1px 20px 5px rgba(0, 0, 0, 0.1);
-        z-index: 10000; /* Over WP Pointers. */
-        box-sizing: border-box;
-        -webkit-overflow-scrolling: touch;
+    clear: both;
+    position: fixed;
+    top: 30px;
+    left: 190px;
+    right: 30px;
+    bottom: 30px;
+    background: #fff;
+    box-shadow: 0 1px 20px 5px rgba(0, 0, 0, 0.1);
+    margin: 32px auto 0 auto;
+    max-width: 1450px;
+    z-index: 10000;
+    /* Over WP Pointers. */
+    box-sizing: border-box;
+    -webkit-overflow-scrolling: touch;
 }
 
 body.folded .theme-browser ~ .theme-overlay .theme-wrap {
@@ -782 +785 @@
         }
 }
 
-@media only screen and (min-width: 1680px) {
-        .theme-overlay .theme-wrap {
-                width: 1450px;
-                margin: 0 auto;
-        }
-}
-
 /* Maximum screenshot width reaches 440px */
 @media only screen and (min-width: 1640px) {
         .theme-browser .theme {