When highlighting matches in suggestions, the highlighting also
matched text of escaped html entities. So for example typing "owner:L"
in the search box showed a mangled "<" in front of the email address:
"Lucy <mail@example.org>" (with all "L", and "l" in bold)
instead of the plain
"Lucy <mail@example.org>" (with all "L", and "l" in bold)
We now un-mangle such matches in text of escaped html entities.
Bug: issue 1574
Change-Id: Ifc0b4f4d52a2b2a5a6a511b943a11d752c186c39
b4438e8606