Nav: Fixed a bug where the initial CTRL-Tab press while in a child window sometimes selected the current root window instead of always selecting the previous root window. (#787)

docs/CHANGELOG.txt

@@ -68,6 +68,8 @@ Other Changes:
 
 - Inputs: Added ImGuiMouseButton enum for convenience (e.g. ImGuiMouseButton_Right=1).
   We forever guarantee that the existing value will not changes so existing code is free to use 0/1/2.
+- Nav: Fixed a bug where the initial CTRL-Tab press while in a child window sometimes selected
+  the current root window instead of always selecting the previous root window. (#787)
 - ColorEdit: Fix label alignment when using ImGuiColorEditFlags_NoInputs. (#2955) [@rokups]
 - ColorEdit: In HSV display of a RGB stored value, attempt to locally preserve Saturation
   when Value==0.0 (similar to changes done in 1.73 for Hue). Removed Hue editing lock since

imgui.cpp

@@ -8766,7 +8766,7 @@ static void ImGui::NavUpdateWindowing()
     if (start_windowing_with_gamepad || start_windowing_with_keyboard)
         if (ImGuiWindow* window = g.NavWindow ? g.NavWindow : FindWindowNavFocusable(g.WindowsFocusOrder.Size - 1, -INT_MAX, -1))
         {
-            g.NavWindowingTarget = g.NavWindowingTargetAnim = window;
+            g.NavWindowingTarget = g.NavWindowingTargetAnim = window->RootWindow; // FIXME-DOCK: Will need to use RootWindowDockStop
             g.NavWindowingTimer = g.NavWindowingHighlightAlpha = 0.0f;
             g.NavWindowingToggleLayer = start_windowing_with_keyboard ? false : true;
             g.NavInputSource = start_windowing_with_keyboard ? ImGuiInputSource_NavKeyboard : ImGuiInputSource_NavGamepad;