Add a warning about using the globals property

[zadjii-msft]

This property was deprecated in 0.11. We probably should have also added a warning
message to help the community figure out that this property is gone and won't work
anymore.

This PR adds that warning.

• I'm not going to list the enormous number of duped threads wait yes I am

  • multiple startup issues #5581
  • guid problem with defaultProblem message when opening Terminal after update to 0.11.1121.0 #5547
  • Old key binding stop working and my type in been changed. #5555
  • PowerShell profile runs WSL instead? #5557
  • 最新版本的setting不能生效 #5573
  • [Terminal v0.11.1121.0] "defaultProfile" section under 'globals' setting isn't working  #5532
  • defaultProfile setting doesn't work  #5527
  • some settings are now ignored #5535
  • Version 0.11.1121.0 seems to ignore the customizations in the configuration file. #5510
  • v0.11.1121.0 Does not allow switching tabs with Alt+1, Alt+2, (etc) #5511
  • v0.11.1121.0 starts powershell by default #5512
  • Smack user in a face with release notes after update #5513
  • Don't apply settings on version 0.11.1121.0 #5516
  • v0.11.1121.0: Ubuntu (WSL) not working #5515
  • 版本升级(0.11.1121.0)之后，凭什么把我的默认终端改成PowerShell #5521
  • This literally isn't even all of them

• Also mainly related to MEGATHREAD: Breaking settings changes in version 0.11! #5458

• I work here

• Tests added/passed

[DHowett-MSFT]

Thanks x1000 for jumping on this. TBD on the link.

[zadjii-msft]

I'm concerned about splitting this resource up

Gah okay that's a valid concern. If we decide this makes the bar for the servicing release, then I can replace the 3 strings here with one more elaborate resource. Probably. I'll figure it out.

[ghost]

Hello @DHowett-MSFT!

Because this pull request has the AutoMerge label, I will be glad to assist with helping to merge this pull request once all check-in policies pass.

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[DHowett-MSFT]

@msftbot merge this in 1 minute

[ghost]

Hello @DHowett-MSFT!

Because you've given me some instructions on how to help merge this pull request, I'll be modifying my merge approach. Here's how I understand your requirements for merging this pull request:

• I won't merge this pull request until after the UTC date Mon, 27 Apr 2020 22:19:23 GMT, which is in 1 minute

If this doesn't seem right to you, you can tell me to cancel these instructions and use the auto-merge policy that has been configured for this repository. Try telling me "forget everything I just told you".

[ghost]

🎉Windows Terminal Preview v0.11.1191.0 has been released which incorporates this pull request.:tada:

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