[16396] ch.elexis.core.ui.eenv reduce to JavaSE-1.8

bundles/ch.elexis.core.ui.eenv/.classpath

 <?xml version="1.0" encoding="UTF-8"?>
 <classpath>
-	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-11"/>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.8"/>
 	<classpathentry kind="con" path="org.eclipse.pde.core.requiredPlugins"/>
 	<classpathentry kind="src" path="src"/>
 	<classpathentry kind="output" path="bin"/>

bundles/ch.elexis.core.ui.eenv/.settings/org.eclipse.jdt.core.prefs

 eclipse.preferences.version=1
-org.eclipse.jdt.core.compiler.codegen.targetPlatform=11
-org.eclipse.jdt.core.compiler.compliance=11
+org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.8
+org.eclipse.jdt.core.compiler.compliance=1.8
 org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
 org.eclipse.jdt.core.compiler.problem.enablePreviewFeatures=disabled
 org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
 org.eclipse.jdt.core.compiler.problem.reportPreviewFeatures=warning
 org.eclipse.jdt.core.compiler.release=enabled
-org.eclipse.jdt.core.compiler.source=11
+org.eclipse.jdt.core.compiler.source=1.8

bundles/ch.elexis.core.ui.eenv/META-INF/MANIFEST.MF

@@ -8,7 +8,7 @@ Require-Bundle: org.eclipse.ui;bundle-version="3.110.0",
  org.eclipse.swt,
  ch.elexis.core
 Automatic-Module-Name: ch.elexis.core.ui.eenv
-Bundle-RequiredExecutionEnvironment: JavaSE-11
+Bundle-RequiredExecutionEnvironment: JavaSE-1.8
 Import-Package: javax.annotation,
  javax.inject;version="1.0.0",
  org.eclipse.e4.core.di.annotations;version="1.6.0",