The current design of the Ctrl+Tab shortcut is inconsistent, it does
not reach the non-modal dialogs. Additionally, if a floating window
contains a tab-control, the shortcut can not be used for the control
The Ctrl+Tab shortcut is close to be a duplication of F6 shortcut, the
only difference is that Ctrl+Tab ignores the document window, and
erroneously ignores the non-modal dialogs. Thus it makes no sense to
support it further.