correct handle hashtag
keep focus on search field after show popover
keep selection while change used docsets
improve search result view
search all docsets
Merge pull request #2 from sycx/BugFix

Bug fix
#3 code template
#4 fixed but still can be improved
fixed #3
mircofix
fixed #9
#7 not finish, pause waiting for better solution.
#8 do not work.... why?