Add UI for setting incident tracking settings

It's a initial implementation of UI for setting incident tracking settings.

* Add a new page to show incident tracking settings.
* Enhance HatoholAddActionDialog to enable adding ACTION_ISSUE_SENDER type action.
* Add a dialog to edit incident tracking servers.
* Add a drop down menu to HatoholNavi to group configuration pages.
* Update DB version of users (sorry, I forgot to do it in the previous pull request)