refractor: self service module (#291)

* Refractor components.
* Improve responsiveness of components.
* Add task management component.
* Add users data resolver.
* Add relative router links.
* Replace mat-icons by font-awesome icons.
* Add comments.

Fixes #290

src/assets/mock/user.mock.json

@@ -1,4 +1,14 @@
 {
-  "id": 1,
-  "username": "abhaychawla"
+  "id": 1600,
+  "username": "abhaychawla",
+  "status": "status",
+  "firstName": "Abhay",
+  "lastName": "Chawla",
+  "gender": "Male",
+  "dateOfBirth": "18/06/1997",
+  "email": "abhay.chawla97@gmail.com",
+  "mobile": "9871105236",
+  "office": "Head Office",
+  "staff": "Smith W",
+  "activationDate": "12/03/2018"
 }