QuickPickItem labels are hidden if description is too long

[vnfedotov]

Bug Description:

Since Theia 1.34 item labels in QuickPick lists are hidden if item descriptions are too long.

Steps to Reproduce:

1. Use vscode.window.showQuickPick
2. Provide vscode.QuickPickItem {label: 'myLabel', description: '${veryLongTextDescription}'}
3. QuickPick item will appear with clipped description and hidden label

Additional Information

• Theia Version: 1.34

[vnfedotov]

Probably an impact of #12095, as it's added overflow: hidden for the relevant css

[vince-fugnitto]

I believe it has been fixed by #12239.