Improve Registration UI with options to select availability to mentor or be a mentee

[nicoledacey]

Description

"Implemented a selection of mentor or mentee option during registration"

Fixes #64

Type of Change:

Delete irrelevant options.

• Changed the constraints between widgets and layouts to allow new components to be placed.
  -Added new checkboxes that allowed the user to decide their role.

Code/Quality Assurance Only
-Found errors when selecting the relation tab.

• Keyboard not hiding when clicking white space
• Text label not clearing when clicking the cancel button.

How Has This Been Tested?

The UI change is not visible nor is connected to the backend.

Code/Quality Assurance Only

• My changes generate no new warnings

[m-murad]

@nicoledacey This needs to be implemented in the backend first.

[isabelcosta]

@m-murad we knew about that, we still wanted to try the UI and see how it would be, we can put this on hold while the backend part is not done. I'll create an issue for that on the backend side.

Backend issue: anitab-org/mentorship-backend#144

[isabelcosta]

@m-murad this functionality is already implemented on the backend (through anitab-org/mentorship-backend#146), but this PR needs that part of integrating with the Backend.

If @nicoledacey does not respond or can't work on this, no problem! We can close this PR, and make the issue available to be worked on by another contributor (linking to this PR with some work already done).

Anyways @nicoledacey thank you for reporting this nice feature and fixing the ConstraintLayout :)

[isabelcosta]

Closing this to be worked by another contributor.