Fixes 3872: Provides a better customizable application layout that
conforms to HTML5 best practices.

This change aims to provide a more customizable application layout by first
splitting the base layout, menu and content out into their own view files.
The base layout provides generic hooks and only the most basic common data...

i18n - extracting new, updating rails, pulling from tx

fixes #3510 - plugin interface for registering a plugin, updated menu system

i18n - extracting new, updating rails, pulling from tx

fixes #3338 - grey out VM form when editing is not supported

fixes #3486 - Make sure loading text is removed when chart data appears.

fixes #3279 roles edit page is long and missing a filter

fixes #3266 - ensures there are no duplicate notifications

fixes #3274 moved config template to the new two-pane and add full screen editing

Changed the on content load direct method call to event

This change allow extending the on content load easly.