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/app/self-service/task-management/task-management.component.spec.ts

@@ -0,0 +1,25 @@
+import { async, ComponentFixture, TestBed } from '@angular/core/testing';
+
+import { TaskManagementComponent } from './task-management.component';
+
+describe('TaskManagementComponent', () => {
+  let component: TaskManagementComponent;
+  let fixture: ComponentFixture<TaskManagementComponent>;
+
+  beforeEach(async(() => {
+    TestBed.configureTestingModule({
+      declarations: [ TaskManagementComponent ]
+    })
+    .compileComponents();
+  }));
+
+  beforeEach(() => {
+    fixture = TestBed.createComponent(TaskManagementComponent);
+    component = fixture.componentInstance;
+    fixture.detectChanges();
+  });
+
+  it('should create', () => {
+    expect(component).toBeTruthy();
+  });
+});