[images] Address review feedback for EditExternallyAction

GitOrigin-RevId: ca7b6df730a5aa8d27aa0333561d5f6ef8b97e84

images/resources/messages/ImagesBundle.properties

@@ -1,5 +1,5 @@
 error.title.launching.external.editor=Problem Launching External Executable
-error.cannot.edit.image.external.editor=Can't edit image in external editor
+error.cannot.edit.image.external.editor=Cannot edit image in an external editor
 
 select.external.executable.title=Select Editor
 select.external.executable.message=Select external graphics editor

images/src/org/intellij/images/actions/EditExternallyAction.kt

@@ -12,6 +12,7 @@ import com.intellij.openapi.actionSystem.CommonDataKeys
 import com.intellij.openapi.actionSystem.PlatformCoreDataKeys
 import com.intellij.openapi.application.EDT
 import com.intellij.openapi.diagnostic.thisLogger
+import com.intellij.openapi.progress.currentThreadCoroutineScope
 import com.intellij.openapi.project.DumbAwareAction
 import com.intellij.openapi.ui.Messages
 import com.intellij.openapi.util.Disposer
@@ -117,7 +118,7 @@ internal class EditExternallyAction : DumbAwareAction() {
   private fun performActionWithBackingFile(e: AnActionEvent, imageFile: VirtualFile) {
     try {
       val disposable = e.getDisposable()
-      disposable.launch {
+      currentThreadCoroutineScope().launch {
         try {
           val backingFile = imageFile.copyToBackingFile(disposable)
           actionPerformed(e, backingFile)
@@ -138,7 +139,7 @@ internal class EditExternallyAction : DumbAwareAction() {
 }
 
 private fun VirtualFile.copyToBackingFile(disposable: Disposable): VirtualFile {
-  val filePath = Files.createTempFile("EditExternallyAction", name)
+  val filePath = Files.createTempFile("EditExternallyAction (copy)", name)
   Disposer.register(disposable, Disposable {
     filePath.safeDelete()
   })
@@ -162,17 +163,6 @@ private fun Path.safeDelete() {
   }
 }
 
-private fun Disposable.launch(block: suspend CoroutineScope.() -> Unit) {
-  val job = SupervisorJob()
-  @Suppress("SSBasedInspection")
-  CoroutineScope(job + Dispatchers.IO).launch {
-    block()
-  }
-  Disposer.register(this, Disposable {
-    job.cancel()
-  })
-}
-
 /**
  * Tries to get a Disposable from the event
  *