Fix #14567: Add 7, 8, 9 to Guitar string numbers in palettes

[HemantAntony]

Resolves: #14567

• [x] I signed CLA
• [x] I made sure the code in the PR follows the coding rules
• [x] I made sure the code compiles on my machine
• [x] I made sure there are no unnecessary changes in the code
• [x] I made sure the title of the PR reflects the core meaning of the issue you are solving
• [x] I made sure the commit message(s) contain a description and answer the question "Why do those changes fix that particular issue?" or "Why are those changes really necessary as improvements?"
• [x] I made sure the commit message title starts with "fix #424242:" if there is a related issue
• [ ] I created the test (mtest, vtest, script test) to verify the changes I made

[abariska]

@HemantAntony Hi! I've just tried to test this PR, but couldn't open the build. It crashes during opening Could you take a look? It's on macOS 12.6 Monterey, macbook Air M1

[its-not-nice]

I just tried this on Win 11 and it also crashes on startup (after the splash screen). The Linux build works fine for me, still, though!

[cbjeukendrup]

@HemantAntony A simple rebase should do the job here; it's probably because of the incompatibility between older master builds and the latest Muse Sampler.

[HemantAntony]

@abariska Can you try again?

[RomanPudashkin]

@HemantAntony please rebase it

[HemantAntony]

@RomanPudashkin rebased