Interrupt command prompt when a Plaster template is invoked

This change fixes an issue where invoking a Plaster template from within
VS Code causes Plaster prompts to be handled incorrectly because the
command prompt has not been interrupted.  The fix is to request that the
command prompt be interrupted when Invoke-Plaster is called.

Fixes PowerShell/vscode-powershell#643.

Author: daviwil

Diff for: src/PowerShellEditorServices/Templates/TemplateService.cs

@@ -174,7 +174,14 @@ public async Task<bool> CreateFromTemplate(
 
             var errorString = new System.Text.StringBuilder();
             await this.powerShellContext.ExecuteCommand<PSObject>(
-                command, errorString, false, true);
+                command,
+                errorString,
+                new ExecutionOptions
+                {
+                    WriteOutputToHost = false,
+                    WriteErrorsToHost = true,
+                    InterruptCommandPrompt = true
+                });
 
             // If any errors were written out, creation was not successful
             return errorString.Length == 0;