tigefa Redmine

Slight gantt export refactoring (#3229).

Fixes a javascript comment (#3238).

Merged r2686, r2687 from trunk

Added some new view hooks to the welcome page.

* :view_welcome_index_left
* :view_welcome_index_right

Added two new plugin hooks to the Project Overview page

* :view_projects_show_left
* :view_projects_show_right

Fixed: %0.2f is rendered as plain text in issues/destroy view (#3167).

Fixes a translation key (#3167).

Fixed: Calendar popup broken by i18n refactoring (#3168).

Adds single forum atom feed (#3181).

Merged r2664, r2665, r2670, r2674, r2677, r2679 from trunk.