:u should undo

[mchong-teal]

Is your feature request related to a problem? Please describe.
A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
I use :u to undo changes in vim:
http://vimhelp.appspot.com/undo.txt.html#undo

Entering the command ':u' does not undo, and instead prints the message 'E492 Not an editor command. u'. I have not been able to find clear documentation on how to change that setting, and it appears in the most recent update the 'otherModesKeyBindings' setting was removed.

The first time this happened to me I immediately uninstalled the extension. It makes me consider uninstalling every time I try and perform an undo action.

Describe the solution you'd like
Entering the command :u[ndo] will undo one change. For bonus points, :u[ndo] {N} jumps to after change number {N}.

Describe alternatives you've considered
Add clear documentation for binding the undo command to :u in command line mode now that 'otherModesKeyBindings' is not available.

Additional context
None

[jpoon]

Although fraught with bugs, undo is a supported operation. What are the exact key presses you are pressing to elicit a E492: Not an editor command?

[mchong-teal]

• Open new file (in normal mode)
• press i (to insert mode)
• type something (or do the thing to be undone)
• press esc (back to normal mode)
• type :, press u, press enter (should undo)

^ doing the above in vim undoes the action (expected behaviour), but displays the above error in vscode.

[mchong-teal]

This is on v0.17.3 (2018-12-30), with vscode Version: 1.30.1.

[mchong-teal]