Refactor organization-contact form to be template-driven form

[juliaanholcer]

Description:
Organization-contact component uses template-driven approach but it will be easier to manage form's state if it will be reactive form.

Refactoring should help e.g. with this problems:

• after submission form is reset and user's data that should populate the form disappear
• after submission alert error for phone field is visible

Additionally, small changes in styling are needed, as inputs in this form are bigger than in most form in the app (change bootstrap classes).

[stanislawK]

Can I take it?

[magul]

Sure @stanislawK