US #903: Task #1012: Compact and expanded US
US #903: Task #1032: Kanban estimation from lightbox
US #903: Task #1013: US can be estimated from the lightbox
US #903: Task #1014: Toggle view mode
US #903: Task #1035: Saved statusViewModes in local storage
US #903: Task #1034: Refactorized tgUsPoints directive
Remove code from us-create-edit lightbox that are now handled by specific directive.
Code style improvements.
Add tgUsEstimation directive.
Merge branch 'kanban-cards'