Incorrect regions in names of extracted regions

The issue was detected during fixing UGENE-1762. The "Get Sequences by Annotations" workflow element correctly extracted sequences, but the names of the extracted sequences were incorrect. The names should contain original regions info. In fact the regions contained the following info: 1..[size_of the_extracted_part].

XML tests are required. The following features must be tested:
1) A simple case.
2) Extracted regions are extended to left and right.
3) Joined regions of the input annotations.
4) Mixed (extended + joined).