#8727

If you are prefer to use spaces instead of tabs - in most cases you
don't want to see tabs anywhere (copy paste issues with other files).

This fixes several workflows:

- Creating new Debug file
- Creating new Tasks file
- Showing global settings (this one is cached, so it shows for the first
  time only right indentation, if you will change it will show old
  indentation till restart)

Fixes #726

Add a $go problem matcher which can interpret errors produced by the
go build, install, and lint commands.

Fixes #4177 ('Auto detecting the task system failed' can be more user friendly) and #3304 (Configure task runner should only open output if autodetection fails or provides output.)