Media: Use flex-start for full browser support.

The value of `start` is not fully supported by Opera Mini which has 1.01% usage. There is no material change in functionality with this change.

Follow-up to [55919].

Props davidbaumwald, sabernhardt, khokansardar, devsahadat.
Fixes #60876.


git-svn-id: https://develop.svn.wordpress.org/trunk@57933 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-admin/css/media.css

@@ -1124,7 +1124,7 @@ border color while dragging a file over the uploader drop area */
 .imgedit-panel-tools > .imgedit-menu {
 	display: flex;
 	column-gap: 4px;
-	align-items: start;
+	align-items: flex-start;
 	flex-wrap: wrap;
 }