Fix message list multi-select/deselect issue (#5219)

Aleksander Machniak

2016-04-21 7dad859ffaf822a8243e739bd23a7259ab0c2de6

1
tinymce.PluginManager.add("hr",function(a){a.addCommand("InsertHorizontalRule",function(){a.execCommand("mceInsertContent",!1,"<hr />")}),a.addButton("hr",{icon:"hr",tooltip:"Horizontal line",cmd:"InsertHorizontalRule"}),a.addMenuItem("hr",{icon:"hr",text:"Horizontal line",cmd:"InsertHorizontalRule",context:"insert"})});