Ticket #44742: 44742.dif

diff --git src/wp-admin/css/dashboard.css src/wp-admin/css/dashboard.css
index 9e818420db..1a4baa8bde 100644
--- src/wp-admin/css/dashboard.css
+++ src/wp-admin/css/dashboard.css
@@ -226,18 +226,54 @@
 }
 
 .try-gutenberg-panel .try-gutenberg-panel-column-container {
-       display: -ms-grid;
-       display: grid;
-       -ms-grid-columns: 36% 32% 32%;
-       grid-template-columns: 36% 32% 32%;
+       display: flex;
        margin-bottom: 13px;
 }
 
+@supports (display: grid) {
+       .try-gutenberg-panel .try-gutenberg-panel-column-container {
+               display: -ms-grid;
+               display: grid;
+               -ms-grid-columns: 36% 32% 32%;
+               grid-template-columns: 36% 32% 32%;
+       }
+}
+
+.try-gutenberg-panel .try-gutenberg-panel-image-column {
+       width: 36%;
+}
+
+@supports (display: grid) {
+       .try-gutenberg-panel .try-gutenberg-panel-image-column {
+               width: auto;
+       }
+}
+
 .try-gutenberg-panel .try-gutenberg-panel-column:not(.try-gutenberg-panel-image-column) {
-       display: -ms-grid;
-       display: grid;
-       -ms-grid-rows: auto 100px;
-       grid-template-rows: auto 100px;
+       display: flex;
+       flex-direction: column;
+       justify-content: space-between;
+       width: 32%;
+}
+
+@supports (display: grid) {
+       .try-gutenberg-panel .try-gutenberg-panel-column:not(.try-gutenberg-panel-image-column) {
+               display: -ms-grid;
+               display: grid;
+               -ms-grid-rows: auto 100px;
+               grid-template-rows: auto 100px;
+               width: auto;
+       }
+}
+
+.try-gutenberg-panel .try-gutenberg-action {
+       height: 100px;
+}
+
+@supports (display: grid) {
+       .try-gutenberg-panel .try-gutenberg-action {
+               height: auto;
+       }
 }
 
 .welcome-panel-column p.hide-if-no-customize {
@@ -255,7 +291,7 @@
 }
 
 .welcome-panel .welcome-panel-column ul {
-               margin: 0.8em 1em 1em 0;
+       margin: 0.8em 1em 1em 0;
 }
 
 .welcome-panel .welcome-panel-column li {
@@ -1269,6 +1305,16 @@ a.rsswidget {
        .try-gutenberg-panel .try-gutenberg-panel-image-column {
                display: none;
        }
+
+       .try-gutenberg-panel .try-gutenberg-panel-column:not(.try-gutenberg-panel-image-column) {
+               width: 50%;
+       }
+
+       @supports (display: grid) {
+               .try-gutenberg-panel .try-gutenberg-panel-column:not(.try-gutenberg-panel-image-column) {
+                       width: auto;
+               }
+       }
 }
 
 @media screen and (max-width: 870px) {
@@ -1280,8 +1326,18 @@ a.rsswidget {
        }
 
        .try-gutenberg-panel .try-gutenberg-panel-column-container {
-               -ms-grid-columns: 100%;
-               grid-template-columns: 100%;
+               flex-wrap: wrap;
+       }
+
+       @supports (display: grid) {
+               .try-gutenberg-panel .try-gutenberg-panel-column-container {
+                       -ms-grid-columns: 100%;
+                       grid-template-columns: 100%;
+               }
+       }
+
+       .try-gutenberg-panel .try-gutenberg-panel-column:not(.try-gutenberg-panel-image-column) {
+               width: 100%;
        }
 
        .welcome-panel .welcome-panel-column li {