CVCenter:*tabProperties made into an IdentityDictionary

Signed-off-by: nuss <st9fan@gmail.com>
mucking around with adding tabs, widgets, blabla…
possibly going to rewrite CVCenter:*makeWindow and *prAddToGui
too much code, a big mess

Signed-off-by: nuss <st9fan@gmail.com>
preparing code clean-up in CVCenter:*makeWindow resp. *prAddToGui…
expect everything to break

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

Signed-off-by: nuss <st9fan@gmail.com>
trying to move tab-creation resp. adding widgets to *prAddToGui

Signed-off-by: nuss <st9fan@gmail.com>
adding new widgets moved to *prAddToGui

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