Block indent / de-indent using TAB / shift-TAB inserts tab characters instead of two spaces.

Furthermore, de-indent does not "undo" indent: given "space space (cursor) x", hitting TAB will give "tab (cursor) x", while shift-TAB gives "(cursor x)".

Tried following settings from Scala / Formatter with no success (and similar settings in General / Editors / Text editors):
- Unchecked Indent using tabs
- Spaces to indent = 2

Workaround is to run the formatter.