Merge branch 'master' into docking

# Conflicts:
#	docs/CHANGELOG.txt
#	imgui_internal.h

imgui_widgets.cpp

@@ -9159,6 +9159,7 @@ bool    ImGui::BeginTabBarEx(ImGuiTabBar* tab_bar, const ImRect& tab_bar_bb, ImG
     // Add to stack
     g.CurrentTabBarStack.push_back(GetTabBarRefFromTabBar(tab_bar));
     g.CurrentTabBar = tab_bar;
+    tab_bar->Window = window;
 
     // Append with multiple BeginTabBar()/EndTabBar() pairs.
     tab_bar->BackupCursorPos = window->DC.CursorPos;