Column sizes in "Browse references" dialog are not remembered

What steps will reproduce the problem?

1. Open the "Browse references" dialog
2. Resize some columns in the list on the right
3. Close the window
4. Open the dialog again

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

Before 2.2.0 TortoiseGit remembered the last sizes of the columns and would use those automatically next time the dialog is displayed. Since 2.2.0 the changed sizes of the colums are no longer remembered and always reset to the default sizes (which are rather small for some columns)

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

TortoiseGit 2.2.0.0 git version 2.7.4.windows.1 Windows 10 x64 Pro

Please provide any additional information below.