Font size restyling
Start page responsiveness improved
icon's backgrounds fix
search bar in the header fixed
bug fixing
Merge branch 'DDB-NEXT-4.0_bug_fix' into develop

Conflicts:
	grails-app/views/item/item.gsp
	web-app/css/ddb.css
	web-app/css/item.css
	web-app/css/viewer.css