JS event handler should not be attached to document objects multiple time.

[Jimmy Chu]

With rails turbolink and js event attachment, in common.js.coffee:

$(document).on "page:change", ->
  $('.modal').on 'shown.bs.modal', (e) ->
    $(e.target).find('[autofocus]').focus()

These codes will attached to a certain object multiple times after browsing pages back and forth.

[LiAh Sheep]

Merged in jimmychu0807/cnpaas-portal (pull request #128)

fix: js listeners no longer bind to DOM objects multiple times. (fix #104)

→ <<cset e27274cf1c82>>