TinyMCE: remove reposition delay on showing the image toolbar. Not needed when no animation. Fixes #30670.

git-svn-id: https://develop.svn.wordpress.org/trunk@30829 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/css/editor.css

@@ -165,6 +165,7 @@ div.mce-inline-toolbar-grp {
 	box-sizing: border-box;
 	margin-bottom: 8px;
 	position: absolute;
+	visibility: hidden;
 	-moz-user-select: none;
 	-webkit-user-select: none;
 	-ms-user-select: none;
@@ -256,6 +257,10 @@ div.mce-inline-toolbar-grp.mce-arrow-full > div {
 	overflow-x: auto;
 }
 
+div.mce-inline-toolbar-grp-active {
+	visibility: visible;
+}
+
 div.mce-toolbar-grp > div {
 	padding: 3px;
 }