Ctrl-Tab should work in "split-only" view as well
The Ctrl-Tab and Ctrl-Shift-Tab were working only when multiple
tabs were opened, but it should work as well when only one tab
is opened but multiple splits are created within that tab.
Open konsole with a single tab, then create several splits.
Use Ctrl-Tab and Ctrl-Shift-Tab to navigate between the splits
in chronological order.
Reviewers: Konsole, hindenburg, tcanabrava
Reviewed By: Konsole, hindenburg
Subscribers: gennad, konsole-devel
Differential Revision: https://phabricator.kde.org/D20395