Revert "Do not display the 'edit' hostname"

This reverts commit 7a3928da6aecfa20d6676150d978bca8eba62ab5.

Commits coming on top of this to add the required function in.

Change-Id: I5fe903f33de66577a807a391227dabaea0ddd69d
Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
diff --git a/app/overview/controllers/system-overview-controller.html b/app/overview/controllers/system-overview-controller.html
index 982b89d..7f26f44 100644
--- a/app/overview/controllers/system-overview-controller.html
+++ b/app/overview/controllers/system-overview-controller.html
@@ -2,8 +2,7 @@
 <div class="overview">
 	<div class="row column">
 		<h1 class="inline">{{dataService.hostname}}</h1>
-		<!-- TODO: openbmc/openbmc#3140 Edit the hostname when a new value is entered.
-		<button class="link" ng-click="edit_server_name = !edit_server_name">edit</button>  --><!-- this is default name. Will show custom server name if set -->
+		<button class="link" ng-click="edit_server_name = !edit_server_name">edit</button><!-- this is default name. Will show custom server name if set -->
 	</div>
 	<section class="row">
 		<div class="column large-8">