don't download the acp search index on mobile

public/src/forum/admin/footer.js

@@ -5,23 +5,9 @@ define('forum/admin/footer', ['forum/admin/settings'], function(Settings) {
 	var acpIndex;
 
 	$(document).ready(function() {
-		$.getJSON(RELATIVE_PATH + '/templates/indexed.json', function (data) {
-			acpIndex = data;
-			for (var file in acpIndex) {
-				if (acpIndex.hasOwnProperty(file)) {
-					acpIndex[file] = acpIndex[file].replace(/<img/g, '<none'); // can't think of a better solution, see #2153
-					acpIndex[file] = $('<div class="search-container">' + acpIndex[file] + '</div>');
-					acpIndex[file].find('ul.nav, script').remove();
-
-					acpIndex[file] = acpIndex[file].text().toLowerCase().replace(/[ |\r|\n]+/g, ' ');
-				}
-			}
-
-			delete acpIndex['/admin/header.tpl'];
-			delete acpIndex['/admin/footer.tpl'];
-
-			setupACPSearch();
-		});
+		if(!/Android|webOS|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini/i.test(navigator.userAgent)) {
+			getSearchIndex();
+		}
 
 		$(window).on('action:ajaxify.end', function(ev, data) {
 			var url = data.url;
@@ -66,6 +52,26 @@ define('forum/admin/footer', ['forum/admin/settings'], function(Settings) {
 		
 		$('#breadcrumbs').html(caret + Array.prototype.slice.call(arguments).join(caret));
 	}
+
+	function getSearchIndex() {
+		$.getJSON(RELATIVE_PATH + '/templates/indexed.json', function (data) {
+			acpIndex = data;
+			for (var file in acpIndex) {
+				if (acpIndex.hasOwnProperty(file)) {
+					acpIndex[file] = acpIndex[file].replace(/<img/g, '<none'); // can't think of a better solution, see #2153
+					acpIndex[file] = $('<div class="search-container">' + acpIndex[file] + '</div>');
+					acpIndex[file].find('ul.nav, script').remove();
+
+					acpIndex[file] = acpIndex[file].text().toLowerCase().replace(/[ |\r|\n]+/g, ' ');
+				}
+			}
+
+			delete acpIndex['/admin/header.tpl'];
+			delete acpIndex['/admin/footer.tpl'];
+
+			setupACPSearch();
+		});
+	}
 	
 	function setupACPSearch() {
 		var menu = $('#acp-search .dropdown-menu');

src/views/admin/header.tpl

@@ -64,7 +64,7 @@
 					</li>
 				</ul>
 
-				<ul id="logged-in-menu" class="nav navbar-nav navbar-right">
+				<ul id="logged-in-menu" class="nav navbar-nav navbar-right hidden-xs">
 					<form class="navbar-form navbar-left" role="search">
 						<div class="form-group" id="acp-search" >
 							<div class="dropdown" >