✨ Close workspace when no tabs are open and "Close Tab" (⌘W) is executed

[austincondiff]

Description

When the user has no tabs open in a workspace and the "Close Tab" (⌘W) command is executed, we should close the workspace. Currently this command has no effect.

Related issues

• ✨ If there is only one file open "Close tab" shortcut (⌘W) should work like "Close Editor" (⌃⇧⌘W) #1398
• ✨ Close split when multiple splits exist, no tabs are open in the split, and "Close Tab" (⌘W) is executed #1410

[austincondiff]

Fixed