### Steps to reproduce

1. Have 3 phases (A,B,C) enabled in a project, all with dates selected.

2. Clear the dates on Phase B.

3. Disable Phase B.

4. Observe Phase C dates, they do not follow Phase A's dates.


### What is the buggy behavior?

* Begin of the deletion EditingEnd of the deletion Phase C Begin of the insertionis not rescheduled to follow Phase A.

* Phase C will show an inconsistent date selection, whereEnd of the insertion Begin of the deletion haveEnd of the deletion the Begin of the insertionuser can select dates before theEnd of the insertion start date Begin of the insertionof Phase C.End of the insertion Begin of the deletion disabled and not following the phase A.End of the deletion


### What is the expected behavior?

_Describe how the application should behave like. Example:_

1. Begin of the insertionDuringEnd of the insertion Begin of the deletion Enable editing onEnd of the deletion the Begin of the deletion start date onEnd of the deletion phase Begin of the insertiondeactivation, reschedule the following phases regardless if the deactivated phase has dates set.End of the insertion Begin of the deletion C.End of the deletion


### Screenshots and other files

**Deactivation of a phase without dates set (Not OK):**

<img class="op-uc-image op-uc-image_inline" src="/api/v3/attachments/624194/content">

**Deactivation of a phase with dates set (OK):**

<img class="op-uc-image op-uc-image_inline" src="/api/v3/attachments/624195/content">