Upgrading to Angular 20:

Replaced checked in package-lock.json by regenerated one.
Ran ng update @angular/core@20 @angular/cli@20
Ran npm install @angular-builders/jest@^20.0.0 @fortawesome/angular-fontawesome@^3.0.0 @swimlane/ngx-graph@^11
Ran npm install ngx-mat-select-search@^8.0.2.
Ran ng update @angular/material@20.
Updated all eslint and typescript to the latest versions.
Removed @angular-devkit/schematics.
Updated fontawesome.
Updated rxjs and tslib.
Moved required node version from 16 to 20.
Updated jest-preset-angular.
Set preserveWhitespaces to false.
Corrected two type declarations in two typescript files to make ng serve run without errors.
Removed unused angular-devkit/schematics from view-user.component.ts .
Updated list of supported browsers.
Upgraded prettier.
Ran prettier . --write the first time.
Ran prettier . --write the second time.
Ran ng generate @angular/core:inject with defaults, excepted a handful of files.
Fixed remaining eslint problems.
Added dist directory to ignores in eslint.config.js.
Let prettier fix formatting, almost everything is just line breaks.
Made htmlhint ignore @if and @for Angular constructs.
Updated node version in Github workflow to 22.12.0 (build.yml).
Updated .env.ts.
Updated Angular datetime format strings from YYYY-MM-DD to yyyy-MM-dd.
Merged changes from dev into angular20 branch.

src/app/shared/long-text/long-text.component.html

@@ -1,7 +1,13 @@
-<span (mouseenter)="mouseEnter()" (mouseleave)="mouseLeave()" *ngIf="!emptyValue">
-  <span class="m-l-3" *ngIf="isLongValue()" (click)="showValue()"
-    ><fa-icon icon="eye" size="sm" [title]="textValue"></fa-icon
-  ></span>
-  <span class="m-l-5" *ngIf="isLongValue()" (click)="showValue()">{{ textValue | truncateText: printChars }}...</span>
-  <span class="m-l-5" *ngIf="!isLongValue()" (click)="showValue()">{{ textValue }}</span>
-</span>
+@if (!emptyValue) {
+  <span (mouseenter)="mouseEnter()" (mouseleave)="mouseLeave()">
+    @if (isLongValue()) {
+      <span class="m-l-3" (click)="showValue()"><fa-icon icon="eye" size="sm" [title]="textValue"></fa-icon></span>
+    }
+    @if (isLongValue()) {
+      <span class="m-l-5" (click)="showValue()">{{ textValue | truncateText: printChars }}...</span>
+    }
+    @if (!isLongValue()) {
+      <span class="m-l-5" (click)="showValue()">{{ textValue }}</span>
+    }
+  </span>
+}