bugfix(z-index): Fixed several z-index problems, progress-bar inside nya deltagare is now hidden behind the header when scrolling. (TV-551)

Squashed commit of the following:

commit 87b53c3d03f71b5cfd6e632e39a3f2723deecdee
Author: Erik Tiekstra <erik.tiekstra@arbetsformedlingen.se>
Date:   Thu Sep 16 10:57:12 2021 +0200

    Fixed issue with z-indexes

apps/mina-sidor-fa/src/app/pages/administration/pages/employee-form/employee-form.component.scss

@@ -2,6 +2,8 @@
 @import 'variables/gutters';
 
 .employee-form {
+  position: relative;
+
   &__header {
     display: flex;
     justify-content: space-between;

apps/mina-sidor-fa/src/app/pages/administration/pages/employees/components/employees-list/employees-list.component.html

@@ -1,5 +1,5 @@
 <div class="employees-list">
-  <msfa-loader *ngIf="employeesLoading" [fullScreen]="true"></msfa-loader>
+  <msfa-loader *ngIf="employeesLoading" type="absolute"></msfa-loader>
   <digi-table af-variation="secondary">
     <table>
       <thead>