SplitContainer glitch in Cherry Pick dialog

What steps will reproduce the problem?

1. Open Cherry Pick dialog for few commits (for example, 10).
2. Move splitter up and down to mave vertical scrollbar show or hide.
3. Look at the buttons panel.

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

There sometimes layout glitch happens that splitter takes place over buttons:

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

• TortoiseGit 2.3.0.0 (x64)
• git version 2.10.1.windows.1 (x64)
• Windows 7 SP1 (x64)

Please provide any additional information below.

By the way, there also thin black line flickers in all splitters when resize(i.e. bad drawing).