[MU4 Issue] When resizing grip with arrow keys, editing should not stop after the first move

[DmitryArefiev]

Describe the bug
When resizing grip with arrow keys, editing should not stop after first action.
You be able to continue bracket resizing with ↑↓ keys (and grip should not disappear #11806)

bandicam.2022-05-30.17-12-17-469.mp4

Platform information
macOS, Windows, Linux

Additional context
#11806
#11731