src/app/create-playlist/create-playlist.component.html

<h4 mat-dialog-title *ngIf="create_mode" ><ng-container i18n="Create a playlist dialog title">Create a playlist</ng-container></h4>
<h4 mat-dialog-title *ngIf="!create_mode"><ng-container i18n="Modify playlist dialog title">Modify playlist</ng-container></h4>

<mat-dialog-content style="max-height: 85vh;">
    <form>
        <div *ngIf="create_mode || playlist">
            <div>
                <mat-form-field color="accent">
                    <mat-label i18n="Playlist name">Name</mat-label>
                    <input [(ngModel)]="name" matInput type="text" required aria-required [ngModelOptions]="{standalone: true}">
                </mat-form-field>
            </div>
            <app-recent-videos [selectMode]="true" [defaultSelected]="preselected_files" [customHeader]="'Select files'" (fileSelectionEmitter)="fileSelectionChanged($event)" [selectedIndex]="create_mode ? 1 : 0"></app-recent-videos>
        </div>
    </form>
</mat-dialog-content>

<div class="spacer"></div>

<mat-dialog-actions>
    <button *ngIf="create_mode" (click)="createPlaylist()" [disabled]="!name || !filesSelect.value || filesSelect.value.length === 0" color="primary" style="float: right" mat-button>
        <ng-container i18n="Create button">Create</ng-container>
    </button>
    <button *ngIf="!create_mode" (click)="updatePlaylist()" [disabled]="!name || !playlistChanged()" color="primary" style="float: right" mat-button>
        <ng-container i18n="Save button">Save</ng-container>
    </button>
    <div *ngIf="create_in_progress" style="margin-left: 10px"><mat-spinner [diameter]="25"></mat-spinner></div>
</mat-dialog-actions>