src/vs/workbench/browser/parts/views/viewPaneContainer.ts/ViewPaneContainer/getTitle
class ViewPaneContainer:	getTitle(): string {
		const containerTitle = this.viewContainerModel.title;

		if (this.isViewMergedWithContainer()) {
			const paneItemTitle = this.paneItems[0].pane.title;
			if (containerTitle === paneItemTitle) {
				return this.paneItems[0].pane.title;
			}
			return paneItemTitle ? `${containerTitle}: ${paneItemTitle}` : containerTitle;
		}

		return containerTitle;
	}