Added the ability to change the display brightness from the Lock Menu

[janwiesemann]

What's new

• Added scroll support for the Lock Menu
• Added the ability to change the display brightness from the Lock menu
• Changed the existing Lock Menu code to support easier expansion

Verification

• Opened the Lock Menu and scrolled around
• Changed some values of the new and old features
• Restarted the device to validate if the settings have been saved correctly

Checklist (For Reviewer)

• [ ] PR has description of feature/bug or link to Confluence/Jira task
• [ ] Description contains actions to verify feature/bugfix
• [ ] I've built this code, uploaded it to the device and verified feature/bugfix

[janwiesemann]

@hedger I've fixed the formatting issues

[skotopes]

I'll forward this to our art team, meanwhile there are couple things I've highlighted in review.

Un-draft when ready.