use nav markup in userguide

Summary:
An explicit navigation markup was recenty added.  Use it in
the userguide instead of ad-hoc -> or `->` chains.

Test Plan: Read the docs.

Reviewers: #blessed_reviewers, epriestley

Reviewed By: #blessed_reviewers, epriestley

Subscribers: epriestley

Differential Revision: https://secure.phabricator.com/D10560

Conflicts:
	src/docs/user/userguide/diffusion_hosting.diviner

src/docs/user/userguide/diffusion_hosting.diviner

@@ -127,7 +127,7 @@ If you plan to use authenticated HTTP, you need to set
 use only anonymous HTTP, you can leave this setting disabled.
 
 If you plan to use authenticated HTTP, you'll also need to configure a VCS
-password in "Settings" -> "VCS Password". This is a different password than
+password in {nav Settings > VCS Password}. This is a different password than
 your main Phabricator password primarily for security reasons.
 
 Otherwise, if you've configured system accounts above, you're all set. No
@@ -254,9 +254,9 @@ Some general tips for troubleshooting problems with HTTP:
 
   - Make sure `diffusion.allow-http-auth` is enabled in your Phabricator config.
   - Make sure HTTP serving is enabled for the repository you're trying to clone.
-    You can find this in "Edit Repository" -> "Hosting".
+    You can find this in {nav Edit Repository > Hosting}.
   - Make sure you've configured a VCS password. This is separate from your main
-    account password. You can configure this in "Settings" -> "VCS Password".
+    account password. You can configure this in {nav Settings > VCS Password}.
   - Make sure the main repository screen in Diffusion shows a clone/checkout
     command for HTTP. If it doesn't, something above isn't set up correctly:
     double-check your configuration. You should see a `svn checkout http://...`,
@@ -291,8 +291,7 @@ Some general tips for troubleshooting problems with SSH:
     SSH Read Only or Read/Write >
     Save Changes}.
   - Make sure you've added an SSH public key to your account. You can do this
-    in {nav Settings >
-    SSH Public Keys}.
+    in {nav Settings > SSH Public Keys}.
   - Make sure the main repository screen in Diffusion shows a clone/checkout
     command for SSH. If it doesn't, something above isn't set up correctly.
     You should see an `svn checkout svn+ssh://...`, `git clone ssh://...` or

src/docs/user/userguide/diffusion_symbols.diviner

@@ -77,7 +77,7 @@ configuration.
 To configure Differential integration, you need to tell Phabricator which
 projects have symbol indexes you want to use, and which other projects they
 should pull symbols from. To do this, go to
-`Repositories -> Arcanist Projects -> Edit` as an administrator. You need to
+{nav Repositories > Arcanist Projects > Edit} as an administrator. You need to
 fill out these fields:
 
   - **Repository**: Associate the project with a tracked repository.

src/docs/user/userguide/external_editor.diviner

@@ -10,8 +10,8 @@ and Diffusion in your preferred text editor.
 
 = Configuring Editors =
 
-To configure an external editor, go to Settings -> Application Settings ->
-Display Preferences and set "Editor Link" to a URI pattern (see below). This
+To configure an external editor, go to {nav Settings > Application Settings >
+Display Preferences} and set "Editor Link" to a URI pattern (see below). This
 will enable an "Open in Editor" link in Differential, and an "Edit" button in
 Diffusion.
 

src/docs/user/userguide/mail_rules.diviner

@@ -16,7 +16,7 @@ write sophisticated rules to route, categorize, or delete email.
 = Reducing Email =
 
 You can reduce the amount of email you receive by turning off some types of
-email in ##Settings -> Email Preferences##. For example, you can turn off email
+email in {nav Settings > Email Preferences}. For example, you can turn off email
 produced by your own actions (like when you comment on a revision), and some
 types of less-important notifications about events.