message: fixing menu dropdown
diff: <li class="nav-item ml-2">
  <app-language class="navbar-btn" isDark="true"></app-language>
  </li>
  - <div class="btn-group" dropdown placement="bottom right" container="body"
  + <div class="btn-group" dropdown placement="bottom"
  *ngIf="isAdmin() || authenticationRequired">
  - <button id="button-basic" dropdownToggle
  + <button id="button-alignment" dropdownToggle
  type="button" class="btn btn-dark dropdown-toggle"
  - aria-controls="dropdown-basic">
  + aria-controls="dropdown-alignment">
  <span class="oi oi-menu"></span>
  <span *ngIf="isAdmin() && notificationService.notifications.length>0"
  class="navbar-badge badge badge-warning">{{notificationService.notifications.length}}</span>
  -
  </button>
  - <ul id="dropdown-basic" *dropdownMenu
  + <ul id="dropdown-alignment" *dropdownMenu
  class="dropdown-menu dropdown-menu-right"
  - role="menu" aria-labelledby="button-basic">
  + role="menu" aria-labelledby="button-alignment">
  <ng-content select="[navbar-menu]"></ng-content>
  <li role="menuitem" *ngIf="isAdmin()">
  <a class="dropdown-item" href="#" [routerLink]="['/duplicates']">
  