Export sequences from msa as annotations to emulate visualization of reads on a reference in sequence view

If we have not may sequences in an alignment we can visualize them as reads on a sequence. This is a common representation of Sanger reads on a reference.
Add a function in msa to export reads as annotations and on a choosen reference sequence. The reads must include information about their strand, so each sequence of msa must include it as well.

Consider backward export (in that case sequence must be a qualifier of an annotation) or other methods of reads visualisation.