Allow to Collapse Blocks

[boppy]

Is your feature request related to a problem? Please describe.
Long config files lack the possibility to get an easy overview of different config directives.

Describe the solution you'd like
In long(er) config files, it would be great to have the possibility to collapse blocks from { to }, so you could easily check all existing locations (for example)

Describe alternatives you've considered
The only alternative (I see) would be to migrate every block into a file that is included into the config.

[meanmail]

Collapse Blocks feature added. The new version is available for download