Narrow spacing improvements

[mike-spa]

Narrow spacing improvements (and a few related things).

Before:

before.mp4

After:

after.mp4

[mike-spa]

@RomanPudashkin yeah, I know it's extremely inefficient, but it's the only way to squeeze everything while still producing an acceptable engraving result. The good news is that LayoutSystem::manageNarrowSpacing() will never be called by the default layout. The conditions for calling this function only happen if the user specifically requires to fit in the system more measures than can normally fit (again, also quite rare). In fact, I've tried the usual Beethoven 9 score and this function never gets called, so the final layout time is even slightly better than current master:

Master:

PR:

Besides that, I've removed the calls to minSysTicks and maxSysTicks cause I've realized that the values could be passed down by the caller. And I've added comments on the constants.

[RomanPudashkin]

@mike-spa The vtests check hangs up on this PR. Please take a look at it

[mike-spa]

Ok, I don't understand why the vtests seem to get stuck: I can run them locally on my machine (Windows) and they run fine. I'll try on my Linux machine and see if something changes.

[mike-spa]

Update on vtests: they run perfectly fine both on my Windows machine and on my Linux machine. So I really don't know what to do with them here

[igorkorsukov]

@mike-spa Please, disable (comment out) the drawdata steps so they don't block you (they are in alpha mode now), I'll see what's wrong later https://github.com/musescore/MuseScore/blob/master/.github/workflows/ci_vtests.yml#L153

[mike-spa]

Ok, I've removed the problematic bit from the vtests and rebased it, let's hope it works 👍 (btw the current master crashes on startup)

[oMrSmith]

The conditions for calling this function only happen if the user specifically requires to fit in the system more measures than can normally fit (again, also quite rare).

Being able to force measures into a system is a heavy new feature! Thanks for introducing this into MuseScore.