Fix the performance of the ARM Template editor
The maximum allowed size of an ARM template that can be posted to the Azure Resource Manager is 1MB as specified here: https://docs.microsoft.com/en-us/azure/azure-subscription-service-limits
The ARM template editor in Visual Studio can't handle anything beyond 200kb. After that, performance degrades noticeably and linearly with the size of the file. Please fix the performance of the editor so that files up to 1 MB can be edited within Visual Studio, with Intellisense.