search household in household mmebers editor

src/Bundle/ChillMainBundle/Resources/public/chill/scss/buttons.scss

@@ -22,6 +22,7 @@ $chill-theme-buttons: (
    "cancel":        $gray-300,
    "choose":        $gray-300,
    "notify":        $gray-300,
+   "search":        $gray-300,
    "unlink":        $chill-red,
    "tpchild":       $chill-pink,
 );
@@ -108,6 +109,7 @@ $chill-theme-buttons: (
    &.btn-notify::before    { content: "\f1d8"; } // fa-paper-plane
    &.btn-tpchild::before   { content: "\f007"; } // fa-user
    &.btn-download::before  { content: "\f019"; } // fa-download
+   &.btn-search::before    { content: "\f002"; } // fa-search
 }