Add multiple monitor support to Set-TaskbarOptions

[HolisticDeveloper]

This request is to enable support for the "Multiple displays" settings found in Windows 10:

• Show taskbar on all displays
• Show taskbar buttons on
  • All taskbars
  • Main taskbar and taskbar where window is open
  • Taskbar where window is open
• Combine buttons on other taskbars
  • Always, hide labels
  • When taskbar is full
  • Never

These are set with the following registry values under HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced (thanks to https://finnzan.blogspot.com/2017/01/windows-10-taskbar-customization.html):

MMTaskbarEnabled
0 = Don't show taskbar on multiple displays
1 = Show taskbar on multiple displays

MMTaskbarMode DWORD
0 = Show taskbar buttons on all taskbars
1 = Show taskbar buttons on main taskbar and taskbar where window is open
2 = Show taskbar buttons on taskbar where window is open

MMTaskbarGlomLevel
0 = Always combine, hide labels
1 = Combine when taskbar is full
2 = Never combine

This seems pretty straightforward so I'm happy to contribute a PR for this.

[flcdrg]

Sounds good!

[HolisticDeveloper]

PR has been submitted (#400).

[veleek]

@pauby - This was closed in February, and the documentation refers to the new function, but I just installed BoxStarter moments ago and it's still got the old function. Am I doing something wrong? Does the new function need to be exported somewhere?

[veleek]

@pauby - Okay, just figured this out. The bootstrapper.ps1 script has been updated to 2.13.0, in the repo, but the one pointed to by the installation instructions (https://boxstarter.org/bootstrapper.ps1) is still the old version.

[veleek]

Issue #458 opened to resolve some additional problems with this new implementation.