Renaming project/creating new Web project should rename .mgcb files

[vchelaru]

Currently the FlatRedBallWebTemplateContent.mgcb remains unnamed when creating a new web project. Not a huge deal, but it would be nice to have that consistency.

[vchelaru]

It should also rename the launchSettings.json:

  "profiles": {
    "FlatRedBallWebTemplate": {
      "commandName": "Project",
      "dotnetRunMessages": true,
      "launchBrowser": true,
      "inspectUri": "{wsProtocol}://{url.hostname}:{url.port}/_framework/debug/ws-proxy?browser={browserInspectUri}",
      "applicationUrl": "http://localhost:5259",
      "environmentVariables": {
        "ASPNETCORE_ENVIRONMENT": "Development"
      }
    },

And also Index.razor:

<PageTitle>FlatRedBallWebTemplate</PageTitle>