INTEG-205: [Unified Search] Missing Searching icon
INTEG-195: [Unified Search] Incorrect UI of Search Result Suggestion
INTEG-195: Incorrect UI of Search Result Suggestion - Update style for icons and thumbnails
INTEG-204: Unified Search - Incorrect icon at Search Result - Add style for icons
INTEG-204: Unified Search - Incorrect icons at Search Result - Update search.js
INTEG-207: [Unified Search] Incorrect UI of Search Preference tab
Merge branch 'fix/4.0.x/PLF-5565' into stable/4.0.x