Enable FUS internal mode on IDE launching

buildSrc/src/main/kotlin/localDependencies.kt

@@ -180,6 +180,7 @@ fun Project.runIdeTask(name: String, ideaPluginDir: File, ideaSandboxDir: File,
             "-Didea.system.path=$ideaSandboxDir",
             "-Didea.config.path=$ideaSandboxConfigDir",
             "-Didea.tooling.debug=true",
+            "-Dfus.internal.test.mode=true",
             "-Dapple.laf.useScreenMenuBar=true",
             "-Dapple.awt.graphics.UseQuartz=true",
             "-Dsun.io.useCanonCaches=false",

gradle/jps.gradle.kts

@@ -213,6 +213,7 @@ if (kotlinBuildProperties.isInJpsBuildIdeaSync) {
                                     "-Didea.system.path=${sandboxDir.absolutePath}",
                                     "-Didea.config.path=${sandboxDir.absolutePath}/config",
                                     "-Didea.tooling.debug=true",
+                                    "-Dfus.internal.test.mode=true",
                                     "-Dapple.laf.useScreenMenuBar=true",
                                     "-Dapple.awt.graphics.UseQuartz=true",
                                     "-Dsun.io.useCanonCaches=false",