Add base for a grid system
Base handling for grid resizing using mouse
Add base resize for sections
Use percent instead of pixels for size
Complete first grid resizable
Start base refactoring for tabs manager
Add content in grid sections
Add base theming for new tabs
Add base for active/desactive tabs
Improve tab states
Remove empty tabs sections and add action to lose others tabs
Base for tab ordering
Detach views before update grid layout
Add base for drag and drop tabs between sections
Improve drag and drop stability for tab sections
Trigger event about change in grid layout
Fix menu of current tab
Fix tab id changement
Use new drag and drop module instead of html5
Improve drag and drop of tabs