[DOCS] Adds release highlights for search for 6.4#32095

Merged

colings86 merged 9 commits into6.xfrom search-highlights-6-4

Jul 24, 2018

+26-1

Commits on Jul 16, 2018

Commits on Jul 17, 2018

expands on missed multiple field collapse item
colings86
authored

Commits on Jul 22, 2018

Address most of the review comments
colings86
authored

Commits on Jul 23, 2018

Addresses link issues in release highlights
lcawl
committed

Commits on Jul 24, 2018