Allow disabling editor.cursorSmoothCaretAnimation in specific modes (particularly insert).

[fnune]

The recent November 2018 update introduces the editor.cursorSmoothCaretAnimation setting.

Problem
The editor.cursorSmoothCaretAnimation looks great in visual and normal mode. However on insert mode it's easy to type faster than the animation moves, which makes it look pretty terrible.

Solution
Add a setting, for example vim.disableCursorSmoothAnimationForModes that takes an array of strings with the modes where the cursor should not animate. Then, you could go:

"vim.disableCursorSmoothAnimationForModes": ["insert"],

[J-Fields]

I'm fairly confident the only possible way of doing this would be to change VSCode's settings every time you switch modes. We've discovered this doesn't work very well, so I suspect this won't happen.