Resolves: tdf#120748 Using the mouse wheel to change tabs in the

sidebar tabbar leaves the key input focus in a control that is not
visible

Change-Id: I9d0b85607b660e3059c6cd528528d773bc3b8ef3
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/172449
Tested-by: Jenkins
Reviewed-by: Jim Raykowski <raykowj@gmail.com>

sfx2/source/sidebar/TabBar.cxx

@@ -218,6 +218,7 @@ bool TabBar::EventNotify(NotifyEvent& rEvent)
                 try
                 {
                     (*pItem)->maDeckActivationFunctor((*pItem)->msDeckId);
+                    GrabFocusToDocument();
                 }
                 catch(const css::uno::Exception&) {};
                 return true;