Enable 2nd adjustment for cross staff beamed notes

[miiizen]

Resolves: #19669

• I signed the CLA
• The title of the PR describes the problem it addresses
• Each commit's message describes its purpose and effects, and references the issue it resolves
• If changes are extensive, there is a sequence of easily reviewable commits
• The code in the PR follows the coding rules
• There are no unnecessary changes
• The code compiles and runs on my machine, preferably after each commit individually
• I created a unit test or vtest to verify the changes I made (if applicable)

[Jojo-Schmitz]

Vtest diff looks good:

For some reason pretty much the same code change doesn't make any difference in 3.x :-(