UI fixes jan vitor

[vitorgomateus]

• Add a dismissible message to the Item View when there is a panopto link and the item is "Account Required" or "By Request"
• Add a help button that resurfaces this message
• Search and browse h2 to link-blue
• Change browse display to a css column system
• Convert item short record to a table, visually comparable to a file directory
• Remove ID’s from visible UI
• add a sr-only heading to label generations of items ex: /item/b2bm16p6178h/
• other UI improvements