Start Work should infer the prefix from the Jira Issue Type similarly to how Jira web Create Branch feature works

[Matt Penner]

When browsing a Jira issue, using the Start Work feature always sets the default Prefix to Bugfix. I have to manually change the Prefix to Feature. I have branching model configured.

When on Jira web, while viewing an issue with a Feature Issue Type, if I click Create Branch it correctly infers the Feature prefix.