add description (#602)

package.json

@@ -574,6 +574,7 @@
         "makefile.panel.visibility": {
           "type": "object",
           "default": null,
+          "description": "%makefile-tools.configuration.makefile.panel.visibility.description%",
           "properties": {
             "debug": {
               "type": "boolean",

package.nls.json

@@ -68,5 +68,6 @@
   "makefile-tools.configuration.makefile.clearOutputBeforeBuild.description": "Clear the output channel at the beginning of a build",
   "makefile-tools.configuration.makefile.compileCommandsPath.description": "The path to the compilation database file",
   "makefile-tools.configuration.makefile.panel.visibility.debug.description": "Enable debugging locally (in this host) images built by this extension",
-  "makefile-tools.configuration.makefile.panel.visibility.run.description": "Enable running locally (in this host) images built by this extension"
+  "makefile-tools.configuration.makefile.panel.visibility.run.description": "Enable running locally (in this host) images built by this extension",
+  "makefile-tools.configuration.makefile.panel.visibility.description": "Modify this setting to control the visibility setting in the Makefile Project Outline panel."
 }