Merge pull request mui#1609 from umidbekkarimov/master

[Table] onRowSelection return 'none' string on unselect all

Author: oliviertassinari

src/table/table.jsx

@@ -235,7 +235,14 @@ const Table = React.createClass({
   },
 
   _onSelectAll() {
-    if (this.props.onRowSelection && !this.state.allRowsSelected) this.props.onRowSelection('all');
+    if (this.props.onRowSelection) {
+      if (!this.state.allRowsSelected) {
+        this.props.onRowSelection('all');
+      } else {
+        this.props.onRowSelection('none');
+      }
+    }
+  
     this.setState({allRowsSelected: !this.state.allRowsSelected});
   },