Single line code collapsing

[edvinv]

Currently when you collapse code block you get two lines. Something like this.

get CurrentSession(): DialerCampaignSessionModel {...
}

This is quite unreadable when you collaps a lot of blocks and also IMO the whole point of collapsings is to get as few lines as possible. For me, following is much better and more readable.

get CurrentSession(): DialerCampaignSessionModel {...}

It will be nice if there was option to select collapsing type. Of course it should work for all languages.

[roblourens]

Master request here: #19690