fixed hickups due to re-grouping widgets after their parent (window) has changed:
CVCenter:*prRegroupWidgets now expects the tab itself as argument instead of its index

Signed-off-by: nuss <st9fan@gmail.com>
trying to find a better regrouping-mechanism based on the onResize-property of a tab's view

Signed-off-by: nuss <st9fan@gmail.com>
see previous commit

Signed-off-by: nuss <st9fan@gmail.com>