function itemFocus(selectedItem, query, explicit) {
        if (!selectedItem || (query.length < 2 && !explicit)) {
            return;
        }
        var selectorInfo = selectedItem.selectorInfo;

        var from = {line: selectorInfo.selectorStartLine, ch: selectorInfo.selectorStartChar};
        var to = {line: selectorInfo.selectorStartLine, ch: selectorInfo.selectorEndChar};
        EditorManager.getCurrentFullEditor().setSelection(from, to, true);
    }
Scroll to the selected item in the current document (unless no query string entered yet,
in which case the topmost list item is irrelevant)
@param {?SearchResult} selectedItem
@param {string} query
@param {boolean} explicit False if this is only highlighted due to being at top of list after search()