Sourcegit closes on selection of Stash 13 or more

Ways to repeat this.

1. Have a git with 13 or more stashes.
2. Switch to stash page.
3. select 13 or past stash.
4. switch to history/local changes pages (or differnt repo tab/ or branch).
5. switch back to stash page.
6. Sourcegit with just close?

Any git repo with no more then 12 stashes works fine, anymore past that though closes.
