Fixed auth control display issues

Prevented auth controls from displaying to regular user with an extra hidden class.
Stopped the sign in button from opening a new tab.

Author: DominicBisset

README.md

@@ -172,4 +172,4 @@ To develop with the database:
      - there's no mechanism to roll back migrations yet, so testing multiple times requires deleting all but the `admins` node from the database and rerunning all migrations again
 - Add the class `signed-out` to any elements you want to be visible when the user isn't signed in
 - Add the classes `signed-in` and `hidden` to the elements you want to show when the user is signed in
-- Add the class `signed-in-admin` on top of the regular `signed-in hidden` to the elements you want to show when the user is signed in as an admin
+- Add the classes `signed-in-admin` and `hidden` on top of the regular `signed-in hidden` to the elements you want to show when the user is signed in as an admin

admin.html

@@ -22,7 +22,7 @@
 			<nav>
 				<a href="game.html">Would you like to play a game?</a>
 				<a id="button-sign-in" class="signed-out" role="button" target="_blank" rel="noopener" href="#">Sign In</a>
-				<a id="button-admin" class="signed-in signed-in-admin hidden" role="button" href="./admin.html">Manage Web App</a>
+				<a id="button-admin" class="signed-in signed-in-admin hidden hidden" role="button" href="./admin.html">Manage Web App</a>
 				<a id="button-sign-out" class="signed-in hidden" role="button" href="#">Sign Out</a>
 			</nav>
 			<ul class="info">

index.html

@@ -21,8 +21,8 @@
 			</a>
 			<nav>
 				<a href="game.html">Would you like to play a game?</a>
-				<a id="button-sign-in" class="signed-out" role="button" target="_blank" rel="noopener" href="#">Sign In</a>
-				<a id="button-admin" class="signed-in signed-in-admin hidden" role="button" href="./admin.html">Manage Web App</a>
+				<a id="button-sign-in" class="signed-out" role="button" href="#">Sign In</a>
+				<a id="button-admin" class="signed-in signed-in-admin hidden hidden" role="button" href="./admin.html">Manage Web App</a>
 				<a id="button-sign-out" class="signed-in hidden" role="button" href="#">Sign Out</a>
 			</nav>
 			<ul class="info">