Adds back in icon and title for gallery block (#27293)

* Brings back title and icon for gallery block

* Brings back title and icon for gallery block

* Removes entire block of CSS that's potentially not required

* Better refactor - props @jasmussen

packages/block-library/src/gallery/editor.scss

@@ -6,17 +6,21 @@
 		list-style-type: none;
 	}
 
-	// @todo: this deserves a refactor, by being moved to the toolbar.
-	.block-editor-media-placeholder {
-		padding: $grid-unit-15;
-
-		// This element is empty here anyway.
-		.components-placeholder__label {
-			display: none;
+	.wp-block-gallery {
+		// Override the default list style type _only in the editor_
+		// to avoid :not() selector specificity issues.
+		// See https://github.com/WordPress/gutenberg/pull/10358
+		li {
+			list-style-type: none;
 		}
-
-		.components-button {
-			margin-bottom: 0;
+		// @todo: this deserves a refactor, by being moved to the toolbar.
+		.block-editor-media-placeholder.is-appender {
+			.components-placeholder__label {
+				display: none;
+			}
+			.block-editor-media-placeholder__button {
+				margin-bottom: 0;
+			}
 		}
 	}
 }