#44 Patch to fix minor problems w/ v5

[Gene Lege]

The attached patch fixes three problems with v5:

1) PHP warnings in advanced search
2) Lack of config placeholder in config.php for
"system_email"
3) The "Update Summary" button on the view issue
screen was not functional.

gl

<speaker@houston.rr.com>
<legeg@saic.com>

[Gene Lege]