Create unique URL for each phase under My Submission and All Submissions Page

**Description**:
If a challenge has multiple phases and the host reloads the My submission page / All Submissions page then the selected phase changes to blank and it becomes inconvenient for the host to select the phase again from the list again.

**Fix**:
Create a unique link for each phase in My Submissions/All Submissions using the slug for the phase in the URL.