src/vs/workbench/browser/layoutState.ts/LayoutStateModel/updateStateFromLegacySettings
class LayoutStateModel:	private updateStateFromLegacySettings(configurationChangeEvent: IConfigurationChangeEvent): void {
		const isZenMode = this.getRuntimeValue(LayoutStateKeys.ZEN_MODE_ACTIVE);

		if (configurationChangeEvent.affectsConfiguration(LegacyWorkbenchLayoutSettings.ACTIVITYBAR_VISIBLE) && !isZenMode) {
			this.setRuntimeValueAndFire(LayoutStateKeys.ACTIVITYBAR_HIDDEN, !this.configurationService.getValue(LegacyWorkbenchLayoutSettings.ACTIVITYBAR_VISIBLE));
		}

		if (configurationChangeEvent.affectsConfiguration(LegacyWorkbenchLayoutSettings.STATUSBAR_VISIBLE) && !isZenMode) {
			this.setRuntimeValueAndFire(LayoutStateKeys.STATUSBAR_HIDDEN, !this.configurationService.getValue(LegacyWorkbenchLayoutSettings.STATUSBAR_VISIBLE));
		}

		if (configurationChangeEvent.affectsConfiguration(LegacyWorkbenchLayoutSettings.SIDEBAR_POSITION)) {
			this.setRuntimeValueAndFire(LayoutStateKeys.SIDEBAR_POSITON, positionFromString(this.configurationService.getValue(LegacyWorkbenchLayoutSettings.SIDEBAR_POSITION) ?? 'left'));
		}
	}