mobile optimizations for acp header

public/less/admin/bootstrap/variables.less

@@ -305,7 +305,7 @@
 @grid-gutter-width:         15px;
 // Navbar collapse
 //** Point at which the navbar becomes uncollapsed.
-@grid-float-breakpoint:     @screen-sm-min;
+@grid-float-breakpoint:     0;
 //** Point at which the navbar begins collapsing.
 @grid-float-breakpoint-max: (@grid-float-breakpoint - 1);
 

src/views/admin/header.tpl

@@ -50,22 +50,16 @@
 	<div class="navbar navbar-inverse navbar-fixed-top header">
 		<div class="container">
 			<div class="navbar-header">
-				<button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-collapse">
-					<span class="icon-bar"></span>
-					<span class="icon-bar"></span>
-					<span class="icon-bar"></span>
-				</button>
-				<a class="navbar-brand nodebb-logo" href="{relative_path}/admin/general/dashboard"><img src="{relative_path}/images/logo.png" alt="NodeBB ACP" /> Admin Control Panel <span id="breadcrumbs"></span></a>
-			</div>
-			<div class="collapse navbar-collapse">
+				<a class="navbar-brand nodebb-logo" href="{relative_path}/admin/general/dashboard"><img src="{relative_path}/images/logo.png" alt="NodeBB ACP" /> Admin Control Panel <span id="breadcrumbs" class="hidden-xs"></span></a>
+			</div>
 			<ul class="nav navbar-nav">
 				<li>
 					<a href="#" id="reconnect"></a>
 				</li>
 			</ul>
 
-				<ul id="logged-in-menu" class="nav navbar-nav navbar-right hidden-xs">
-					<form class="navbar-form navbar-left" role="search">
+			<ul id="logged-in-menu" class="nav navbar-nav navbar-right">
+				<form class="navbar-form navbar-left hidden-xs" role="search">
 					<div class="form-group" id="acp-search" >
 						<div class="dropdown" >
 							<input type="text" data-toggle="dropdown" class="form-control" placeholder="Search ACP...">
@@ -87,11 +81,9 @@
 						</li>
 					</ul>
 				</li>
-
 			</ul>
 		</div>
 	</div>
-	</div>
 
 	<div class="wrapper">
 		<div id="main-menu" class="nano">