added classes to grid, list and detail view

to allow specific styling
also fixed an issue with gridview sort indicator css.

fixes #1000

apps/advanced/backend/web/css/site.css

@@ -60,6 +60,10 @@ a.desc:after {
 	content: "\e156";
 }
 
+.grid-view th {
+    white-space: nowrap;
+}
+
 .hint-block {
 	display: block;
 	margin-top: 5px;

apps/advanced/frontend/web/css/site.css

@@ -60,6 +60,10 @@ a.desc:after {
 	content: "\e156";
 }
 
+.grid-view th {
+    white-space: nowrap;
+}
+
 .hint-block {
 	display: block;
 	margin-top: 5px;

apps/basic/web/css/site.css

@@ -60,6 +60,10 @@ a.desc:after {
 	content: "\e156";
 }
 
+.grid-view th {
+    white-space: nowrap;
+}
+
 .hint-block {
 	display: block;
 	margin-top: 5px;

framework/yii/grid/GridView.php

@@ -49,6 +49,11 @@ class GridView extends BaseListView
 	 */
 	public $tableOptions = ['class' => 'table table-striped table-bordered'];
 	/**
+	 * @var array the HTML attributes for the container tag of the grid view.
+	 * The "tag" element specifies the tag name of the container element and defaults to "div".
+	 */
+	public $options = ['class' => 'grid-view'];
+	/**
 	 * @var array the HTML attributes for the table header row
 	 */
 	public $headerRowOptions = [];

framework/yii/widgets/DetailView.php

@@ -90,7 +90,7 @@ class DetailView extends Widget
 	 * @var array the HTML attributes for the container tag of this widget. The "tag" option specifies
 	 * what container tag should be used. It defaults to "table" if not set.
 	 */
-	public $options = ['class' => 'table table-striped table-bordered'];
+	public $options = ['class' => 'table table-striped table-bordered detail-view'];
 	/**
 	 * @var array|Formatter the formatter used to format model attribute values into displayable texts.
 	 * This can be either an instance of [[Formatter]] or an configuration array for creating the [[Formatter]]

framework/yii/widgets/ListView.php

@@ -52,6 +52,11 @@ class ListView extends BaseListView
 	 * @var string the HTML code to be displayed between any two consecutive items.
 	 */
 	public $separator = "\n";
+	/**
+	 * @var array the HTML attributes for the container tag of the list view.
+	 * The "tag" element specifies the tag name of the container element and defaults to "div".
+	 */
+	public $options = ['class' => 'list-view'];
 
 
 	/**