Implemented: in cons mode, when dragging, then place the effect frame such that the cursor is centralized location-wise within the effect frame.
Implemented: in cons mode, when dragging, then place the effect frame
such that the cursor is centralized location-wise within the effect
frame.

Implemented also: don't remove target frame and effect frame until the
actual effect has been performed (or has started at least). This goes in
general for modes.

Signed-off-by: Jakob Brandsborg Ehmsen <387ed33cc9ebf98b733caa2520baacd616b28aa5@gmail.com>
jakobehmsen/dynamake