Added visual documentation of the account menu component (#6775)

* Added visual documentation of the menu bar component

* updated CHANGELOG.md

* renamed to account menu which is the component highlighted in the screenshot

* updated contributions document

CHANGELOG.md

@@ -14,6 +14,7 @@
 - [#6714](https://github.com/MetaMask/metamask-extension/pull/6714): Wrap smaller custom block explorer url text
 - [#6706](https://github.com/MetaMask/metamask-extension/pull/6706): Pin ethereumjs-tx
 - [#6700](https://github.com/MetaMask/metamask-extension/pull/6700): Fix styles on 'import account' page, update help link
+- [#6775](https://github.com/MetaMask/metamask-extension/pull/6775): Started adding visual documentation of MetaMask plugin components with the account menu component first
 
 ## 6.6.2 Fri Jun 07 2019
 

docs/components/account-menu.md

@@ -0,0 +1,20 @@
+# Account Menu
+
+The account menu is the popup menu which contains options such as:
+ - Logging out
+ - Switching accounts
+ - Creating a new account
+ - Importing an account
+ - Connecting a HW wallet
+ - Looking up info & help
+ - Adjusting settings
+ 
+ It can be seen below where it has been outlined with a red box
+ 
+ ![Screenshot of account menu](https://i.imgur.com/xpkfIuR.png) 
+ 
+ Above screenshot showing the menu bar in MetaMask 6.7.1
+ 
+   
+
+