connect & disconnect sliders & textfields in CVCenter globally

connect/disconnect a single slider: shift + b
connect/disconnect a single textfield: shift + v
connect/disconnect all sliders within CVCenter: alt + shift + b
connect/disconnect all textfields within CVCenter: alt + shift + v

Signed-off-by:  <st9fan@gmail.com>
(cherry picked from commit 53095f86d6e8471e7db8d2d75fe7d6d7667ce4bd)
Signed-off-by: Stefan Nussbaumer <st9fan@gmail.com>