Test new folding actions

[aeschli]

Issue: #3580
Assignees:

• @alexandrudima

Details:

• Ctrl + K, Ctrl + 1 : Folds all regions of level 1, except if a cursor is placed in it
• Ctrl + K, Ctrl + 2 : Folds all regions of level 2, except if a cursor is placed in it
...
• Ctrl + K, Ctrl + 5 : Folds all regions of level 5, except if a cursor is placed in it