Implement clickable vomnibar entries, and other fixes

- <del>fix: update permissions
    I tested on `chrome version: Version 27.0.1453.65 beta`
    `paltform:Linux ubuntu 12.04`,`arch:x86`
    and permission `management` must be required.Without tha permission, options page will hang up and can't read setting data (Vimium even totally can't work).</del>

- fix #615
    TODO: reset `A` elements' `target` attribute to open in a new tab

- fix #810
    MUST click to open the editable page

- and fix string splitting