Server Overview: Fix capitalization on "Server configuration"

The other tabs are "Server health", "Server control", and
"Server overview". Have "Server configuration" follow the
same capitalization convention.

Change-Id: If794c36cddc6fd3118b41ca780140c409f11d1f7
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
diff --git a/app/common/directives/app-navigation.html b/app/common/directives/app-navigation.html
index 3213345..4fa82b7 100644
--- a/app/common/directives/app-navigation.html
+++ b/app/common/directives/app-navigation.html
@@ -56,7 +56,7 @@
 						l1.4,2.3L30,16.7l-0.8,0.7l0.2,1.1c0.1,0.6,0.1,1,0.1,1.5s0,0.9-0.1,1.5l-0.2,1.1l0.8,0.7L32.4,25.4z"/>
 					<path d="M20,15c-2.8,0-5,2.2-5,5s2.2,5,5,5s5-2.2,5-5S22.8,15,20,15z M20,23c-1.7,0-3-1.3-3-3c0-1.7,1.3-3,3-3c1.7,0,3,1.3,3,3C23,21.7,21.7,23,20,23z"/>
 				</svg>
-				Server Configuration</span></button>
+				Server configuration</span></button>
 		</li>
 		<li>
 			<button class="btn-users" ng-class="{opened: firstLevel == 'users'}" ng-click="change('users')" tabindex="5">