Bug 721464 - Program won’t open the website link

Rejigger the about dialog call so that there's a signal to connect
to gnc_launch_assoc; gtk_show_uri requires gvfs.

git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@23739 57a11ea4-9604-0410-9ed3-97b8803252fd
Bug 722123 - Zero price entry added to price database on stock purchase

Just needed to get the new price back from the cell after it was
calculated.

git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@23740 57a11ea4-9604-0410-9ed3-97b8803252fd