`--force-alphabetical-sort` breaks `--lines-between-types=0`

Hello, and thanks for a very useful package!

If I set --force-alphabetical-sort then an extra line is inserted between import and from even if --lines-between-types=0

Start with this test file:

import one
import two
from three import four
from five import six

HELLO = 'world'

Running isort --lines-between-types=0 test_isort.py gets:

import one
import two
from five import six
from three import four

HELLO = 'world'

This has no empty line between import and from as expected.

isort --force-alphabetical-sort --lines-between-types=0 test_isort.py gives:

from five import six
from three import four

import one
import two

HELLO = 'world'

which you will note adds an empty line!

Thanks and have an excellent weekend.

Start with the commands and reproducer in test_isort.py, comparing output with and without --force-alphabetical-sort while --lines-between-types=0 is set. Trace the formatting path responsible for grouping imports, then add or update a regression test so forced alphabetical sorting does not insert an empty line between import and from groups.