fix(lib): fix unresponsive layout of perun header

* Changed flex-wrap: wrap to nowrap
* Replaced align-elements class with bootstrap classes

Author: michalberky

libs/perun/components/src/lib/header-menu/header-menu.component.html

@@ -1,4 +1,4 @@
-<div class="align-elements">
+<div class="d-flex flex-nowrap align-items-center">
   <button
     mat-icon-button
     [matMenuTriggerFor]="appsMenu"

libs/perun/components/src/lib/header-menu/header-menu.component.scss

@@ -3,9 +3,3 @@
     padding-left: 0;
   }
 }
-
-.align-elements {
-  display: flex;
-  align-items: center;
-  flex-wrap: wrap;
-}