This patch has few "nasties" in it:

1) repairs behaviour only for ">" and "<" commands (not "y", "d", ...). If we can agree on that this is the correct way to do, I can broaden the change in patch.
2) creates new hooks in KateViNormalMode.
3) under de hood, provides translation from Vim conception of selection to Kate one.

suggestions on how to improve greatly welcomed.

The reason for change is similar to https://git.reviewboard.kde.org/r/114061/.