Update documentation for new unified clone dialog

docs/using/cloning-a-repository-to-visual-studio.md

@@ -2,7 +2,7 @@
 
 After you provide your GitHub or GitHub Enterprise credentials to GitHub for Visual Studio, the extension automatically detects the personal, collaborator and organization repositories you have access to on your account.
 
-## Opening the clone dialog 
+## Opening the clone dialog
 
 ### From **Team Explorer**
 
@@ -17,7 +17,7 @@ Next to the account you want to clone from, click **Clone**.
 
 ### From the **Start Page**
 
-Using Visual Studio 2017, click the `GitHub` button on the `Start Page` to open the clone dialog. 
+Using Visual Studio 2017, click the `GitHub` button on the `Start Page` to open the clone dialog.
 
 
 ### From the **File** menu
@@ -26,14 +26,19 @@ Go to `File > Open > Open From GitHub...`
 
 
 ## Clone repositories
-1. In the list of repositories, scroll until you find the repository you'd like to clone. You can also filter the repository results by using the *Filter* text box.
+1. In the list of repositories, scroll until you find the repository you'd like to clone.
 
-![List of GitHub repositories that can be cloned inside a dialog](images/clone-dialog.png)
+You can also filter the repository results by using the *Filter* text box.
 
-In addition to using the list of personal, collaborator and organization repositories, you can use the URL tab to clone a public repository by its URL or using the repository owner and name.
+In addition to using the list of personal, collaborator and organization repositories, you can enter a repository URL or repository owner and name to clone a public repository.
 
-![List of GitHub repositories that can be cloned inside a dialog](images/clone-url-dialog.png)
+![Unified clone and open dialog](images/unified-clone-dialog.png)
 
 2. If desired, change the local path that the repository will be cloned into, or leave the default as-is.
 3. Once a repository is selected and the path is set, Click **Clone**.
 4. In Team Explorer, under the list of solutions, double-click on a solution to open it in Visual Studio.
+
+## Open repositories
+For any repository that you select from the list or provide a URL for that you already have cloned locally, the **Open** button becomes enabled and a message shows that you have already cloned the repository to that location.
+
+![Open option enabled in clone dialog](images/open-cloned-repository.png)