Merge branch 'hotfix/3.2.15' into hotfix/3.3.6

Conflicts:
	assets/contao/css/layout.css
	assets/contao/js/core-uncompressed.js
	assets/contao/js/core.js
	assets/mootools/core/1.5.1/mootools-request-uncompressed.js
	system/config/constants.php
	system/modules/core/drivers/DC_Table.php
	system/modules/core/library/Contao/ModuleLoader.php
	system/modules/core/vendor/phpdiff/Diff/Renderer/Html/Contao.php
	system/themes/default/basic.css

Author: leofeyer

assets/contao/css/layout-uncompressed.css

@@ -107,13 +107,14 @@ select,input,textarea {
  * Hide invisible elements
  */
 .invisible {
-	width:0;
-	height:0;
-	left:-1000px;
-	top:-1000px;
-	position:absolute;
+	border:0;
+	clip:rect(0 0 0 0);
+	height:1px;
+	margin:-1px;
 	overflow:hidden;
-	display:inline;
+	padding:0;
+	position:absolute;
+	width:1px;
 }
 
 /**

assets/contao/css/layout.css

@@ -856,8 +856,8 @@ var Backend =
 			this.hide();
 		});
 		M.addButton(Contao.lang.apply, 'btn primary', function() {
-			var val = [],
-				frm = window.frames['simple-modal-iframe'];
+			var frm = window.frames['simple-modal-iframe'],
+				val = [], inp, i;
 			if (frm === undefined) {
 				alert('Could not find the SimpleModal frame');
 				return;
@@ -866,8 +866,8 @@ var Backend =
 				alert(Contao.lang.picker);
 				return; // see #5704
 			}
-			var inp = frm.document.getElementById('tl_listing').getElementsByTagName('input');
-			for (var i=0; i<inp.length; i++) {
+			inp = frm.document.getElementById('tl_listing').getElementsByTagName('input');
+			for (i=0; i<inp.length; i++) {
 				if (!inp[i].checked || inp[i].id.match(/^check_all_/)) continue;
 				if (!inp[i].id.match(/^reset_/)) val.push(inp[i].get('value'));
 			}