Default to vim behaviour for Ctrl+D (#2314)
Default to vim behaviour for Ctrl+D (#2314)

Users installing a vim plugin will probably expect Ctrl+D to work like
vim.

This overrides the default behaviour in VS Code where Ctrl+D is a
shortcut to "Add Selection to Next Find Match".
VSCodeVim/Vim,Chillee/Vim,Chillee/Vim,VSCodeVim/Vim