please fix search issue in phone/name input box

it seems that it can not search name with space characters. (as i know 1.9.1 and 1.9.2 have this issue)

e.g,

there is a contact with a name of  "hong rongbin"

when input "hong", the above contact appears in the search result list ( a long list), but when i continue to input space character  and following "rongbin" string, the search result list will become null (no match).

please fix this issue.