Add Query
If query is "123", jump to page
Implement Query#add_p_to_number
If a input query has a title or book option, search from all books

'aaa'       -> Search from current
't:aaa bbb' -> Search from all
'b:aaa bbb' -> Search from all
Fix error when the number of pages is too large
Convert a number to 'page_no:number'
Fix error when page.text is null
Display the beginning of text when search snippet is empty