Update documentation URL in side menu for Electron compatibility

src/app/app.component.html

@@ -97,7 +97,7 @@
           <mat-icon>report_problem</mat-icon>
           {{ uitextSidenavReportBug }}
         </a>
-        <a id="side-nav-help" target="_blank" href="assets/docs-fr/" (click)="sidenav.close()">
+        <a id="side-nav-help" target="_blank" href="assets/docs-fr/index.html" (click)="sidenav.close()">
           <mat-icon>help</mat-icon>
           {{ uitextSidenavHelp }}
         </a>

src/app/components/calculator-list/calculator-list.component.html

@@ -3,7 +3,6 @@
     <mat-card class="welcome-card" *ngIf="nbOpenCalculators === 0">
 
         <mat-card-header>
-            <!-- <img mat-card-avatar src="https://s3.amazonaws.com/pix.iemoji.com/images/emoji/apple/ios-12/256/water-wave.png"> -->
             <mat-card-title>{{ uitextWelcomeTitle }}</mat-card-title>
             <mat-card-subtitle>{{ uitextWelcomeSubtitle }}</mat-card-subtitle>
         </mat-card-header>