We should have a workspace folder picker API in the Extension host

[dbaeumer]

Extensions now need to scope certain actions (like settings changes) to a workspace folder. In a multi workspace folder setup the need to ask the user which folder to use. To make such a picker the same for all extensions we should offer API for this.

[bpasero]

/cc @sandy081 @jrieken

[sandy081]

How different is this that an extension show a quick pick with workspace folders and asking to pick?

[dbaeumer]

To always make it look the same and use the name as the label and the directory as the description.

[dbaeumer]

To always make it look the same and use the name as the label and the directory as the description.

[cipheroth]

Don't do this