[DSC-1847][DSC-1966] fix navbar ui error

(cherry picked from commit 49b329e)

Author: Andrea Barbasso

src/themes/dspace/app/header-nav-wrapper/header-navbar-wrapper.component.scss

@@ -28,7 +28,6 @@
 
   ::ng-deep {
     .ds-menu-item, .ds-menu-toggler-wrapper {
-      white-space: nowrap;
       text-decoration: none;
     }
 

src/themes/dspace/app/header/header.component.html

@@ -1,19 +1,19 @@
 <header id="main-site-header">
-  <div class="container h-100 d-flex flex-row flex-wrap align-items-center justify-content-between gapx-3 gapy-2" id="main-site-header-container">
+  <div class="container h-100 d-flex flex-row align-items-center justify-content-between gapx-3 gapy-2" id="main-site-header-container">
     <!-- Logo and navbar wrapper -->
     <div id="header-left"
          [attr.role]="(isMobile$ | async) ? 'navigation' : 'presentation'"
          [attr.aria-label]="(isMobile$ | async) ? ('nav.main.description' | translate) : null"
-         class="h-100 flex-fill d-flex flex-row flex-nowrap justify-content-start align-items-center gapx-3">
+         class="h-100 flex-fill d-flex flex-row flex-nowrap justify-content-start align-items-center gapx-3 flex-grow-1">
       <a class="d-block my-2 my-md-0" routerLink="/home" [attr.aria-label]="'home.title' | translate">
         <img id="header-logo" src="assets/images/dspace-logo.svg" [attr.alt]="'menu.header.image.logo' | translate"/>
       </a>
-      <nav *ngIf="(isMobile$ | async) !== true" class="navbar navbar-expand p-0 align-items-stretch align-self-stretch" id="desktop-navbar" [attr.aria-label]="'nav.main.description' | translate">
+      <nav *ngIf="(isMobile$ | async) !== true" class="navbar navbar-expand p-0 align-items-stretch align-self-stretch flex-grow-1 flex-shrink-1" id="desktop-navbar" [attr.aria-label]="'nav.main.description' | translate">
         <ds-navbar></ds-navbar>
       </nav>
     </div>
     <!-- Search bar and other menus -->
-    <div id="header-right" class="h-100 d-flex flex-row flex-nowrap justify-content-end align-items-center gapx-1 ml-auto">
+    <div id="header-right" class="h-100 d-flex flex-row flex-nowrap flex-shrink-0 justify-content-end align-items-center gapx-1 ml-auto">
       <ds-search-navbar></ds-search-navbar>
       <div role="menubar" class="h-100 d-flex flex-row flex-nowrap align-items-center gapx-1">
         <ds-lang-switch></ds-lang-switch>

src/themes/dspace/app/navbar/navbar.component.html

@@ -1,7 +1,7 @@
 <ng-container *ngIf="(isMobile$ | async) && (isAuthenticated$ | async)">
   <ds-user-menu [inExpandableNavbar]="true"></ds-user-menu>
 </ng-container>
-<div class="navbar-nav h-100 align-items-md-stretch gapx-3" role="menubar" id="main-site-navigation" [ngClass]="(isMobile$ | async) ? 'navbar-nav-mobile' : 'navbar-nav-desktop'">
+<div class="navbar-nav flex-shrink-1 h-100 align-items-md-stretch gapx-3" role="menubar" id="main-site-navigation" [ngClass]="(isMobile$ | async) ? 'navbar-nav-mobile' : 'navbar-nav-desktop'">
   <ng-container *ngFor="let section of (sections | async)">
     <ng-container
       *ngComponentOutlet="(sectionMap$ | async).get(section.id)?.component; injector: (sectionMap$ | async).get(section.id)?.injector;"></ng-container>