Implemented "Save" and "Save and close" functions for sprint add and edit modals.
Implemented "Save" and "Save and close" functions for story add and edit modals.
Bug fix for sprint save function.
Implemented "Save" and "Save and close" functions for story add and edit modals.
Implemented "Save" and "Save and close" functions for task add and edit modals.
Implemented "Save" and "Save and close" functions for milestone add and edit modals.
Small layout fixes.