Refactor the profile preferences docs

doc/user/profile/preferences.md

@@ -4,19 +4,14 @@ A user's profile preferences page allows the user to customize various aspects
 of GitLab to their liking.
 
 To navigate to your profile's preferences, click your avatar icon in the top
-right corner and select **Settings**. From there on, choose the **Preferences**
-tab.
-
-![Profile preferences settings](img/profile_settings_dropdown.png)
+right corner, select **Settings** and then choose **Preferences** from the
+left sidebar.
 
 ## Navigation theme
 
->**Note:**
-Navigation themes have been re-introduced with [GitLab 10.0](https://about.gitlab.com/2017/09/22/gitlab-10-0-released/).
-
 The GitLab navigation theme setting allows you to personalize your GitLab experience.
 You can choose from several color themes that add unique colors to the top navigation
-and left side navigation.  
+and left side navigation.
 Using individual color themes might help you differentiate between your different
 GitLab instances.
 
@@ -33,13 +28,13 @@ The default palette is Indigo. You can choose between 10 different themes:
 - Dark
 - Light
 
-![Profile preferences syntax highlighting themes](img/profile-preferences-syntax-themes.png)
+![Profile preferences navigation themes](img/profil-preferences-navigation-theme.png)
 
 ## Syntax highlighting theme
 
->**Note:**
-GitLab uses the [rouge Ruby library][rouge] for syntax highlighting. For a
-list of supported languages visit the rouge website.
+NOTE: **Note:**
+GitLab uses the [rouge Ruby library](http://rouge.jneen.net/ "Rouge website")
+for syntax highlighting. For a list of supported languages visit the rouge website.
 
 Changing this setting allows you to customize the color theme when viewing any
 syntax highlighted code on GitLab.
@@ -52,7 +47,7 @@ The default syntax theme is White, and you can choose among 5 different colors:
 - Solarized dark
 - Monokai
 
-![Profile preferences navigation themes](img/profil-preferences-navigation-theme.png)
+![Profile preferences syntax highlighting themes](img/profile-preferences-syntax-themes.png)
 
 ## Behavior
 
@@ -78,7 +73,7 @@ You have 8 options here that you can use for your default dashboard view:
 - Your projects' activity
 - Starred projects' activity
 - Your groups
-- Your [Todos]
+- Your [Todos](../../workflow/todos.md)
 - Assigned Issues
 - Assigned Merge Requests
 
@@ -92,6 +87,3 @@ You can choose between 3 options:
 - Files and Readme (default)
 - Readme
 - Activity
-
-[rouge]: http://rouge.jneen.net/ "Rouge website"
-[todos]: ../../workflow/todos.md