fix: amend close to call closeCallback instead

Author: AB1908

src/modals/MediaDbPreviewModal.ts

@@ -75,4 +75,8 @@ export class MediaDbPreviewModal extends Modal {
 	onOpen(): void {
 		this.preview();
 	}
+	
+	onClose(): void {
+		this.closeCallback();
+	}
 }

src/utils/ModalHelper.ts

@@ -398,7 +398,6 @@ export class ModalHelper {
 		}
 
 		if (previewModalResult.code === ModalResultCode.CLOSE) {
-			previewModal.close();
 			return undefined;
 		}