Menus: Fixed a bug where activating an item in a child-menu and dragging mouse over the parent-menu would erroneously close the child-menu. (#6869)

Regression from 0dec430

docs/CHANGELOG.txt

@@ -96,6 +96,8 @@ Other changes:
 - BeginGroup(): Fixed a bug pushing line lower extent too far down when called after a call
   to SameLine() followed by manual cursor manipulation.
 - BeginListBox(): Fixed not consuming SetNextWindowXXX data when returning false.
+- Menus: Fixed a bug where activating an item in a child-menu and dragging mouse over the
+  parent-menu would erroneously close the child-menu. (Regression from 1.88). (#6869)
 - MenuBar: Fixed an issue where layouting an item in the menu-bar would erroneously
   register contents size in a way that would affect the scrolling layer.
   Was most often noticable when using an horizontal scrollbar. (#6789)

imgui_widgets.cpp

@@ -7497,7 +7497,7 @@ bool ImGui::BeginMenuEx(const char* label, const char* icon, bool enabled)
         // The 'HovereWindow == window' check creates an inconsistency (e.g. moving away from menu slowly tends to hit same window, whereas moving away fast does not)
         // But we also need to not close the top-menu menu when moving over void. Perhaps we should extend the triangle check to a larger polygon.
         // (Remember to test this on BeginPopup("A")->BeginMenu("B") sequence which behaves slightly differently as B isn't a Child of A and hovering isn't shared.)
-        if (menu_is_open && !hovered && g.HoveredWindow == window && !moving_toward_child_menu && !g.NavDisableMouseHover)
+        if (menu_is_open && !hovered && g.HoveredWindow == window && !moving_toward_child_menu && !g.NavDisableMouseHover && g.ActiveId == 0)
             want_close = true;
 
         // Open