[Redesign] Address sidebar feedback

[loic-sharma]

I recommend reviewing without whitespace changes:

Here is a summary of the changes:

-* "About package" section
+* "About" section
    * Last updated date
    * Project website
    * Source repository
    * License info
-  
-    <whitespace>
- 
    * Download package
    * Download symbols
+   * "Open in NuGet package explorer" link
+   * "Open in FuGet package explorer" link
+   * "Report package" link
+
+* "Manage" section
    * "Manage package" link
    * "Delete symbols" link
    * "Reflow package" link
    * "Revalidate package" link
    * "Revalidate symbols" link
    * "View validations" link
+   * "Contact support" link 
-   * "Open in NuGet package explorer" link
-   * "Open in FuGet package explorer" link
-   * "Contact support" or "Report package" link

Screenshot if logged out...

Screenshot if logged in as owner...

Screenshot if logged in as admin...

Addresses #8717

[dannyjdev]

Looks good!