#612 Fix autocompleting of allele names

[Kim Rutherford]

(Transferred from [curation-tool:#451])

Reuse allele info (name and description)
We should be able to reuse alleles for a specific gene if we have used an allele in a previous
session, (i.e they should appear in the autocomplete)
AND if we add an allele name, the
description could be populated automatically (currently this happens within a session but
not between sessions).

I think this was partially done, because in this (now closed, duplicate) item it worked partially int he test tool, but not in the main tool
https://sourceforge.net/p/pombase/curation-tool/388/
The way it works in the test tool, is nearly right but not quite. If I type cdc2, I also see
alleles previously curated for cdc22 cdc20, cdc25 etc, so this should be restricted to the gene
being annotated.

1. we can probably also assume that allele names are case insensitive.
   (e.g.from cdc2) cdc2-3w and cdc2-3W

[Kim Rutherford]

This is fixed, except that the autocomplete only shows alleles from the current session and from Chado (which has the APPROVED sessions too). Alleles from other (non yet approved) sessions aren't autocompleted.

[Valerie Wood]

OK I think that is all we need.
val