respond to PR review feedback

Author: chuckries

src/coreclr-debug/main.ts

@@ -79,6 +79,7 @@ export function activate(context: vscode.ExtensionContext, reporter: TelemetryRe
         return writeCompletionFile();
     }).then(function() {
         installStage = "completeSuccess";
+        statusBarMessage.dispose();
         vscode.window.setStatusBarMessage('Successfully installed .NET Core Debugger.');
     })
     .catch(function(error) {

src/coreclr-debug/proxy.ts

@@ -43,9 +43,9 @@ function proxy() {
 
     if (!CoreClrDebugUtil.existsSync(util.installCompleteFilePath())) {
         if (CoreClrDebugUtil.existsSync(util.installBeginFilePath())) {
-            process.stdout.write(serializeProtocolEvent(new ProxyErrorResponse('The .NET Core Debugger has not finished installing. See Status Bar for details.')));
+            process.stdout.write(serializeProtocolEvent(new ProxyErrorResponse('The .NET Core Debugger is still being downloaded. See the Status Bar for more information.')));
         } else {
-            process.stdout.write(serializeProtocolEvent(new ProxyErrorResponse('Run \'Debugger: Install .NET Core Debugger\' command or open a .NET project directory to download the .NET Core Debugger')));
+            process.stdout.write(serializeProtocolEvent(new ProxyErrorResponse('Run \'Debug: Download .NET Core Debugger\' in the Command Palette or open a .NET project directory to download the .NET Core Debugger')));
         }
     }
     else