[VIM Mode] Add g<up> g<down> commands
Summary:
Add twin commands for gj and gk for usage with standard
arrow keys.
BUG: 418486
FIXED-IN: 5.69
Test Plan:
- Open document with large sentences, that span across multiple visual lines in Kate and use gj and gk commands in normal mode to move inside a line.
- Use g<down> and g<up> commands - the result must be the same, as using gj and gk commands.
- Repeat the same for visual mode.
Reviewers: Kate, Frameworks
Subscribers: cullmann, dhaumann, kwrite-devel, kde-frameworks-devel
Tags: Kate, Frameworks
Differential Revision: https://phabricator.kde.org/D27928