Fix handling of the empty preset option

Signed-off-by: trivernis <trivernis@protonmail.com>

mediarepo-ui/src/app/components/shared/sidebar/file-search/sort-dialog/sort-dialog.component.html

@@ -5,7 +5,7 @@
     <mat-form-field *ngIf="this.availablePresets.length > 0" class="preset-selection">
         <mat-label>Preset</mat-label>
         <mat-select (selectionChange)="this.selectPreset($event.value)" [value]="this.previousId">
-            <mat-option [value]="this.emptyPreset"></mat-option>
+            <mat-option [value]="-1"></mat-option>
             <mat-option *ngFor="let preset of this.availablePresets"
                         [matTooltipShowDelay]="1000"
                         [matTooltip]="preset.toString()"

mediarepo-ui/src/app/components/shared/sidebar/file-search/sort-dialog/sort-dialog.component.ts

@@ -116,8 +116,8 @@ export class SortDialogComponent implements OnInit {
     }
 
     public selectPreset(presetId: number): void {
-        const preset = this.availablePresets.find(p => p.id == presetId);
-        
+        const preset = this.availablePresets.find(p => p.id == presetId) ?? this.emptyPreset;
+
         if (preset) {
             this.sortingPreset.setData(JSON.parse(JSON.stringify(preset.rawData)));
             this.previousId = preset.id;