Menus: fixed top-level menu from not consistently using style.PopupRounding. (#4788)

+ Stack tool default size.

docs/CHANGELOG.txt

@@ -74,6 +74,7 @@ Other Changes:
 - Menus: fixed closing a menu by clicking on its menu-bar item when inside a popup. (#3496, #4797) [@xndcn]
 - Menus: fixed menu inside a popup/modal not inhibiting hovering of items in the popup/modal. (#3496, #4797)
 - Menus: fixed sub-menu items inside a popups from closing the popup.
+- Menus: fixed top-level menu from not consistently using style.PopupRounding. (#4788)
 - InputText, Nav: fixed repeated calls to SetKeyboardFocusHere() preventing to use InputText(). (#4682)
 - Inputtext, Nav: fixed using SetKeyboardFocusHere() on InputTextMultiline(). (#4761)
 - InputText: made double-click select word, triple-line select line. Word delimitation logic differs

imgui.cpp

@@ -12530,6 +12530,9 @@ void ImGui::DebugHookIdInfo(ImGuiID id, ImGuiDataType data_type, const void* dat
 // Stack Tool: Display UI
 void ImGui::ShowStackToolWindow(bool* p_open)
 {
+    ImGuiContext& g = *GImGui;
+    if (!(g.NextWindowData.Flags & ImGuiNextWindowDataFlags_HasSize))
+        SetNextWindowSize(ImVec2(0.0f, GetFontSize() * 8.0f), ImGuiCond_FirstUseEver);
     if (!Begin("Dear ImGui Stack Tool", p_open) || GetCurrentWindow()->BeginCount > 1)
     {
         End();
@@ -12537,7 +12540,6 @@ void ImGui::ShowStackToolWindow(bool* p_open)
     }
 
     // Display hovered/active status
-    ImGuiContext& g = *GImGui;
     const ImGuiID hovered_id = g.HoveredIdPreviousFrame;
     const ImGuiID active_id = g.ActiveId;
 #ifdef IMGUI_ENABLE_TEST_ENGINE

imgui_widgets.cpp

@@ -7050,7 +7050,9 @@ bool ImGui::BeginMenuEx(const char* label, const char* icon, bool enabled)
     if (menu_is_open)
     {
         SetNextWindowPos(popup_pos, ImGuiCond_Always); // Note: this is super misleading! The value will serve as reference for FindBestWindowPosForPopup(), not actual pos.
+        PushStyleVar(ImGuiStyleVar_ChildRounding, style.PopupRounding); // First level will use _PopupRounding, subsequent will use _ChildRounding
         menu_is_open = BeginPopupEx(id, flags); // menu_is_open can be 'false' when the popup is completely clipped (e.g. zero size display)
+        PopStyleVar();
     }
     else
     {