Support 'vertical' Workspace warping

'Vertical' Workspace warping is a variant of the existing Workspace
warping feature: When a user drags a window to the edge of the Screen,
the window is warped to the next / previous workspace.

'Vertical' Workspace warping detects a drag towards the upper / lower
border of the screen and warps the current workspace about an 'offset'.
Example given, lets say the user has 9 workspaces and considers them to
form a 3x3 grid:

  +-+-+-+
  |1|2|3|
  +-+-+-+
  |4|5|6|
  +-+-+-+
  |7|8|9|
  +-+-+-+

An 'offset' of 3 warps from workspaces 2 to workspace 5 (or 8), when a
window is dragged to the bottom / top border.

New configuration ressources:

    session.screenN.workspacewarpingvertical: true
    session.screenN.workspacewarpingverticaloffset: X

0 files changed, 0 insertions, 0 deletions