Remove behavior of merging Computed pane in the Elements Tab

Currently when the width of the DevTools' viewport is within some range,
the Computed pane is merged inside the Styles pane. This behavior is
confusing and performance-intensive. This CL removes this bahavior.

Design doc: https://goo.gle/computed-pane-positioning

Bug: chromium:1073899
Change-Id: I2d2ed6feaf22f686c12105e71861ad360ee19b89
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/2232945
Commit-Queue: Changhao Han <[email protected]>
Reviewed-by: Mathias Bynens <[email protected]>
Reviewed-by: Alex Rudenko <[email protected]>
Auto-Submit: Changhao Han <[email protected]>
diff --git a/front_end/ui/Widget.js b/front_end/ui/Widget.js
index 2e2fc1e..f412a5a 100644
--- a/front_end/ui/Widget.js
+++ b/front_end/ui/Widget.js
@@ -376,7 +376,7 @@
   }
 
   /**
-   * @param {boolean=} overrideHideOnDetach
+   * @param {boolean=} overrideHideOnDetach remove element from DOM instead of hiding
    */
   detach(overrideHideOnDetach) {
     if (!this._parentWidget && !this._isRoot) {