Fix default fallback for Sublime::View.
Summary:
Fix startup crash of KDevelop by using an existing view instead of a
list index that cannot exist.
Reviewers: KDevelop, kfunk
Reviewed By: KDevelop, kfunk
Subscribers: kfunk, Sergobot, kdevelop-devel
Projects: KDevelop
Differential Revision: https://phabricator.kde.org/D760