Adding tooltips to indicate functionality of buttons when switching views of search results

[hostle83]

Describe the bug

There are three buttons below the Breadcrumbs when viewing search results. Those buttons allow for toggling between search result views: list, grid, and map.

Adding tooltips when hovering over these buttons would improve usability.

See https://sandbox.dspace.org/search?spc.page=1&query=test&view=list

[jesielviana]

I’ll take a look.