adding feature to click inside menu and not close

in order to use this feature you have to add data-keep-opened="class-opened" to the element containing context-menu directive.

you also need to add the class "class-opened" to the element inside the context menu that you don't want to be closed when clicked on.

working Plunkr:
http://plnkr.co/edit/a8QNKfxSN7p0a9SE10EC?p=preview