Mirage2 - fixed bug where clicking on a + or - in community-list made the browser jump to top of page

Having a DSpace with lots of communities and/or collections makes you have to scroll down to go to the bottom of the list. If you click on a + or - for a collection or community at the bottom of the page, it will make the browser jump up to the top of the page because of href="#".

Changing it to a href="javascript:void(0)" fixes this issue without affecting functionality.