UI regression in main menu and context menu when there is an icon

[safisa]

Bug Description:

Hi,
In the last Theia 1.39 there is a regression in menu items having icons, the selection item will cut the left corner of the icon!
See the attached images.

Steps to Reproduce:

1. just open the Run menu, or any context menu with an icon
2. select an item with an icon
3. you will see the icon is cut

Additional Information

• Operating System: mac and window
• Theia Version: Theia 1.39

[vince-fugnitto]

I can confirm the bug, it seems to be a regression introduced with #12252.