* Remaking activity show page
* Added a global loader view with progress bar and text
* Added the edition subapp in activities show
+ Summary subapp in activity show
* Working on activity planning
+ activity show planning : drag&drop
* activity show : Corrected color problem in planning
* Working on tasks list in task show
* Added + button in activity show tasks list
* Changed visuals of small task thumbnail
* Working on task creation view
Merge branch 'Features/organization-activityshow' into Features/organization