117287: Fixed various layout issues

- The unthemed home news didn't stick to the header like the dspace theme
- Impersonate user button has additional margin
- Submission form loading icon is not translatable
- Create resource policy page doesn't have the correct heading

(cherry picked from commit 56e45a9f08)

src/app/shared/resource-policies/create/resource-policy-create.component.html

@@ -1,5 +1,5 @@
 <div class="container">
-  <h4 class="mb-3">{{'resource-policies.create.page.heading' | translate}} {{targetResourceName}}</h4>
+  <h1 class="mb-3">{{'resource-policies.create.page.heading' | translate}} {{targetResourceName}}</h1>
 
   <ds-resource-policy-form [isProcessing]="isProcessing()"
                            (reset)="redirectToAuthorizationsPage()"

src/app/submission/form/submission-form.component.html

@@ -26,7 +26,7 @@
     </div>
 
     <div class="submission-form-content">
-        <ds-themed-loading *ngIf="(isLoading$ | async) === true" message="Loading..."></ds-themed-loading>
+        <ds-themed-loading *ngIf="(isLoading$ | async) === true" [message]="'form.loading' | translate"></ds-themed-loading>
         <ng-container *ngFor="let object of (submissionSections | async)">
             <ds-submission-section-container [collectionId]="collectionId"
                                              [submissionId]="submissionId"

src/app/submission/form/submission-form.component.spec.ts

@@ -1,4 +1,4 @@
-import { ChangeDetectorRef, Component, NO_ERRORS_SCHEMA, SimpleChange } from '@angular/core';
+import { ChangeDetectorRef, Component, SimpleChange } from '@angular/core';
 import { ComponentFixture, inject, TestBed, waitForAsync } from '@angular/core/testing';
 
 import { of as observableOf } from 'rxjs';
@@ -26,6 +26,7 @@ import { Item } from '../../core/shared/item.model';
 import { TestScheduler } from 'rxjs/testing';
 import { SectionsService } from '../sections/sections.service';
 import { VisibilityType } from '../sections/visibility-type';
+import { TranslateModule } from '@ngx-translate/core';
 
 describe('SubmissionFormComponent', () => {
 
@@ -47,7 +48,9 @@ describe('SubmissionFormComponent', () => {
 
   beforeEach(waitForAsync(() => {
     TestBed.configureTestingModule({
-      imports: [],
+      imports: [
+        TranslateModule.forRoot(),
+      ],
       declarations: [
         SubmissionFormComponent,
         TestComponent
@@ -60,7 +63,6 @@ describe('SubmissionFormComponent', () => {
         ChangeDetectorRef,
         SubmissionFormComponent
       ],
-      schemas: [NO_ERRORS_SCHEMA]
     }).compileComponents();
   }));