Comment on invalid comment regarding preserving keyboard focus of a closed window, due to commit 19d02becef. This is probably still what we want. (followup #727)

imgui.cpp

@@ -1924,10 +1924,7 @@ bool ImGui::FocusableItemRegister(ImGuiWindow* window, bool is_active, bool tab_
     // Process keyboard input at this point: TAB, Shift-TAB switch focus
     // We can always TAB out of a widget that doesn't allow tabbing in.
     if (tab_stop && window->FocusIdxAllRequestNext == INT_MAX && window->FocusIdxTabRequestNext == INT_MAX && is_active && !g.IO.KeyCtrl && IsKeyPressedMap(ImGuiKey_Tab))
-    {
-        // Modulo on index will be applied at the end of frame once we've got the total counter of items.
-        window->FocusIdxTabRequestNext = window->FocusIdxTabCounter + (g.IO.KeyShift ? (allow_keyboard_focus ? -1 : 0) : +1);
-    }
+        window->FocusIdxTabRequestNext = window->FocusIdxTabCounter + (g.IO.KeyShift ? (allow_keyboard_focus ? -1 : 0) : +1); // Modulo on index will be applied at the end of frame once we've got the total counter of items.
 
     if (window->FocusIdxAllCounter == window->FocusIdxAllRequestCurrent)
         return true;
@@ -2267,7 +2264,7 @@ void ImGui::NewFrame()
     }
 
     // Pressing TAB activate widget focus
-    // NB: Don't discard FocusedWindow if it isn't active, so that a window that go on/off programatically won't lose its keyboard focus.
+    //// NB: Don't discard FocusedWindow if it isn't active, so that a window that go on/off programatically won't lose its keyboard focus. // [2016/07/17] That comment was made invalid by 19d02becef94e8e0f1d432a8bd55cd783876583c
     if (g.ActiveId == 0 && g.FocusedWindow != NULL && g.FocusedWindow->Active && !g.IO.KeyCtrl && IsKeyPressedMap(ImGuiKey_Tab, false))
         g.FocusedWindow->FocusIdxTabRequestNext = 0;