No obvious way to set JDT settings

I would like to use the "Text Blocks" feature of Java 13. I have the Java 13 JDK installed and that is being picked up correctly by VSCode.

In addition, I have modified my "pom.xml" file to include the "--enable-preview" JVM argument that turns on this feature, like so:

	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
				<configuration>
					<jvmArguments>--enable-preview</jvmArguments>
				</configuration>
			</plugin>
		</plugins>
	</build>

I also attempted to edit the .settings/org.eclipse.jdt.core.prefs file and set org.eclipse.jdt.core.compiler.problem.enablePreviewFeatures=enabled but any changes to this file are overwritten when the "Clean the java language workspace" task is run

Environment

• Operating System: Linux
• JDK version: 13
• Visual Studio Code version: 1.40.1
• Java extension version: 0.53.1

Steps To Reproduce

1. Create Java project with Java 13
2. Attempt to use Text Block syntax

Current Result

Expected Result

I expect to be able to enable preview features in JDT and for Text Blocks to work with no compiler error

Reproduce el error de Text Blocks de Java 13 en un proyecto que use la configuración pom.xml mostrada y, a continuación, inspecciona cómo se genera el archivo .settings/org.eclipse.jdt.core.prefs cuando se limpia el espacio de trabajo del lenguaje Java. Se considera terminado cuando las funciones de vista previa permanecen habilitadas en JDT y la sintaxis de Text Block no produce ningún error del compilador.