CompletionList should be able to point to best suggestion

[ghost]

Issue Type: Bug

(Recommended completions were added in microsoft/TypeScript#20020.)
Test with:

enum E { A, B }
const e: E = 

Hit ctrl-space to get completions after the =. E will be put at the top of the completions list instead of sorted by name. The problem is, the completion list is immediately focused on console, leaving E offscreen where it will probably never be seen. It would be better to immediately focus on E, and leave it sorted by alphabetically.

VS Code version: Code - Insiders 1.22.0-insider (6c22e21, 2018-03-30T14:36:39.526Z)
OS version: Linux x64 4.13.0-37-generic

System Info

Item	Value
CPUs	Intel(R) Core(TM) i7-6700HQ CPU @ 2.60GHz (8 x 2600)
Load (avg)	1, 1, 1
Memory (System)	7.63GB (1.66GB free)
Process Argv	/usr/share/code-insiders/code-insiders src
Screen Reader	no
VM	0%

Extensions: none

[jrieken]

use "editor.suggestSelection": "first",

[vscodebot]

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[ghost]

@mjbvz Could you reopen this? Based on our discussion yesterday, the editor should prioritize the currently recommended completion over reusing a previous completion.

[mjbvz]

@jrieken We'd like a way for extensions to flag a suggestion as recommended so that it takes priority over the suggestion history

[jrieken]

We have this as preselect: https://github.com/Microsoft/vscode/blob/769013834ce9824ecf7768965eecb08dd4308e7d/src/vs/vscode.d.ts#L3211