Check for platform updates even with external package manager

Send request for platform updates when running from Toolbox, but don't show results.
Add info about Toolbox to platform updates request.

platform/platform-impl/src/com/intellij/openapi/updateSettings/impl/UpdateChecker.kt

@@ -155,15 +155,11 @@ object UpdateChecker {
   }
 
   private fun checkPlatformUpdate(settings: UpdateSettings): CheckForUpdateResult {
-    if (!settings.isPlatformUpdateEnabled) {
-      return CheckForUpdateResult(UpdateStrategy.State.NOTHING_LOADED, null)
-    }
-
     val updateInfo: UpdatesInfo?
     try {
       var updateUrl = Urls.newFromEncoded(updateUrl)
       if (updateUrl.scheme != URLUtil.FILE_PROTOCOL) {
-        updateUrl = prepareUpdateCheckArgs(updateUrl)
+        updateUrl = prepareUpdateCheckArgs(updateUrl, settings.packageManagerName)
       }
       LogUtil.debug(LOG, "load update xml (UPDATE_URL='%s')", updateUrl)
 
@@ -171,7 +167,10 @@ object UpdateChecker {
           .forceHttps(settings.canUseSecureConnection())
           .connect {
             try {
-              UpdatesInfo(loadElement(it.reader))
+              if (settings.isPlatformUpdateEnabled)
+                UpdatesInfo(loadElement(it.reader))
+              else
+                null
             }
             catch (e: JDOMException) {
               // corrupted content, don't bother telling user
@@ -446,10 +445,13 @@ object UpdateChecker {
     ourAdditionalRequestOptions[name] = value
   }
 
-  private fun prepareUpdateCheckArgs(url: Url): Url {
+  private fun prepareUpdateCheckArgs(url: Url, packageManagerName: String?): Url {
     addUpdateRequestParameter("build", ApplicationInfo.getInstance().build.asString())
     addUpdateRequestParameter("uid", PermanentInstallationID.get())
     addUpdateRequestParameter("os", SystemInfo.OS_NAME + ' ' + SystemInfo.OS_VERSION)
+    if (packageManagerName != null) {
+      addUpdateRequestParameter(packageManagerName, "")
+    }
     if (ApplicationInfoEx.getInstanceEx().isEAP) {
       addUpdateRequestParameter("eap", "")
     }