Removed all mr-5, mb-5 and basis tailwind classes.

Will soon remove tailwind totally.

bookie/src/app/header-footer/header-footer.component.html

@@ -4,7 +4,7 @@
   </mat-card-header>
   <mat-card-content>
     <form [formGroup]="form" class="flex flex-col">
-      <div class="flex flex-row justify-around content-start items-start">
+      <div class="row-container">
         <mat-form-field class="flex-auto">
           <mat-label>Header / Footer</mat-label>
           <mat-select formControlName="id" (selectionChange)="show($event)">