Devtools: Add new row in toolbarButtonGlyphs and layout editor icon

Source/devtools/front_end/ui/section.css

Index: Source/devtools/front_end/ui/section.css
diff --git a/Source/devtools/front_end/ui/section.css b/Source/devtools/front_end/ui/section.css
index ab1e19ef948d4347912889a7b584cda5bc42d815..8fdcbe03e463bb488274102d4e2dd6e3f988c044 100644
--- a/Source/devtools/front_end/ui/section.css
+++ b/Source/devtools/front_end/ui/section.css
@@ -20,7 +20,7 @@
 .section > .header::before {
     -webkit-user-select: none;
     background-image: url(Images/toolbarButtonGlyphs.png);
-    background-size: 352px 144px;
+    background-size: 352px 168px;
     opacity: 0.5;
     content: "a";
     color: transparent;