DevTools: Preserve the selection in StylesSideBar more often

third_party/WebKit/Source/devtools/front_end/elements/StylesSidebarPane.js

Index: third_party/WebKit/Source/devtools/front_end/elements/StylesSidebarPane.js
diff --git a/third_party/WebKit/Source/devtools/front_end/elements/StylesSidebarPane.js b/third_party/WebKit/Source/devtools/front_end/elements/StylesSidebarPane.js
index 30e0ebbe8a7e4f4206ab7bfea3a42da9ad81dd2d..7336342faaf7968c2b0d71c3de09fe9da1a772e7 100644
--- a/third_party/WebKit/Source/devtools/front_end/elements/StylesSidebarPane.js
+++ b/third_party/WebKit/Source/devtools/front_end/elements/StylesSidebarPane.js
@@ -1240,6 +1240,10 @@ Elements.StylePropertiesSection = class {
     if (!event.target.isComponentSelectionCollapsed())
       return;
 
+    if (this.propertiesTreeOutline.element.shadowRoot.firstChild &&
+        !this.propertiesTreeOutline.element.shadowRoot.firstChild.isComponentSelectionCollapsed())
+      return;
+
     if (this._checkWillCancelEditing())
       return;