Close TortoiseGitBlame window by ESC key

What steps will reproduce the problem?

What is the expected output? What do you see instead?

I'd like to close the TortoiseGitBlame window by the ESC key, similar as the Diff or Log window. Instead, nothing happens.

What version of TortoiseGit and Git are you using? On what operating system?

TortoiseGit 2.5.0.0 git version 2.12.1.windows.1 Win 8.1

Please provide any additional information below.

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