fix #877

+ editor-default.xhtml : base template for edit and host page
* host.xhtml: "edit game" switch to edit.xhtml
* edit.xhtml: "go back to game" is we're editing a GameModel of a Game
Fix previous commit stupidity

* edit.xhtml: use wegas-editor-layout.json rather than wegas-host-layout.json
Fix PMG Choices Stupidity
fix #873 : remove confirmation popup when leaving a game

* LeaveGameAction plugin
PMG GANTT & Resource reservation: update UI on server response

* reservation and planification PMG plugins
Minor Source Style
Merge branch 'master' into glassfish4

* master:
  Minor Source Style
  PMG GANTT & Resource reservation: update UI on server response
  fix #873 : remove confirmation popup when leaving a game
  Fix PMG Choices Stupidity
  Fix previous commit stupidity
  fix #877

Conflicts:
	wegas-app/src/main/webapp/wegas-pmg/js/plugin/wegas-pmg-planification.js