Add GNOME 42 support. In sync with upstream. No regressions found.

[Mershl]

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[Mershl]

Hi @jylertones,

you still around? For Gnome 43 we'll need to sync a bit to upstream.

EDIT: upstream also errors out for now. Let's wait a bit.
EDIT2: commenting out the AggregateLayout usage makes it work again. Though the layout for the onclick popup is slightly scuffed. Good enough for the moment.

Currently gnome-shell-extension-mpris-indicator-button errors out on startup on Gnome 43:

gnome-shell[1742]: JS ERROR: Extension mprisindicatorbutton@tyler.doublejones.com: TypeError: AggregateLayout is not a constructor
                                               _init@/var/home/mershl/.local/share/gnome-shell/extensions/mprisindicatorbutton@tyler.doublejones.com/widgets.js:1570:40
                                               ButtonBox@resource:///org/gnome/shell/ui/panelMenu.js:11:1
                                               PanelMenuButton@resource:///org/gnome/shell/ui/panelMenu.js:97:4
                                               MprisIndicatorButton@/var/home/mershl/.local/share/gnome-shell/extensions/mprisindicatorbutton@tyler.doublejones.com/widgets.js:1565:3
                                               enable@/var/home/mershl/.local/share/gnome-shell/extensions/mprisindicatorbutton@tyler.doublejones.com/extension.js:41:37
                                               _callExtensionEnable@resource:///org/gnome/shell/ui/extensionSystem.js:184:32
                                               loadExtension@resource:///org/gnome/shell/ui/extensionSystem.js:385:26
                                               _loadExtensions/<@resource:///org/gnome/shell/ui/extensionSystem.js:633:18
                                               collectFromDatadirs@resource:///org/gnome/shell/misc/fileUtils.js:28:28
                                               _loadExtensions@resource:///org/gnome/shell/ui/extensionSystem.js:612:19
                                               _enableAllExtensions@resource:///org/gnome/shell/ui/extensionSystem.js:639:18
                                               _sessionUpdated@resource:///org/gnome/shell/ui/extensionSystem.js:659:14
                                               init@resource:///org/gnome/shell/ui/extensionSystem.js:57:14
                                               _initializeUI@resource:///org/gnome/shell/ui/main.js:309:22
                                               start@resource:///org/gnome/shell/ui/main.js:186:5
                                               @resource:///org/gnome/shell/ui/init.js:6:17

[jylertones]

@Mershl should we still merge this?

[Mershl]

Hi @jylertones, Gnome 3.32 until 44 support should be backwards compatible.

I just pushed Gnome 45 support, which is the first upgrade that really breaks support for old versions. I'd recommend using the 44 commit on Gnome 44 and older and the latest on Gnome 45.