Merge branch 'master' into docking

# Conflicts:
#	backends/imgui_impl_sdlgpu3.cpp
#	imgui.cpp

imgui.cpp

@@ -402,6 +402,9 @@ IMPLEMENTING SUPPORT for ImGuiBackendFlags_RendererHasTextures:
                           - likewise io.MousePos and GetMousePos() will use OS coordinates.
                             If you query mouse positions to interact with non-imgui coordinates you will need to offset them, e.g. subtract GetWindowViewport()->Pos.
 
+ - 2026/02/27 (1.92.7) - Commented out legacy signature for Combo(), ListBox(), signatures which were obsoleted in 1.90 (Nov 2023), when the getter callback type was changed.
+                         - Old getter type:   bool (*getter)(void* user_data, int idx, const char** out_text)   // Set label + return bool. False replaced label with placeholder.
+                         - New getter type:   const char* (*getter)(void* user_data, int idx)                   // Return label or NULL/empty label if missing
  - 2026/01/08 (1.92.6) - Commented out legacy names obsoleted in 1.90 (Sept 2023): 'BeginChildFrame()' --> 'BeginChild()' with 'ImGuiChildFlags_FrameStyle'. 'EndChildFrame()' --> 'EndChild()'. 'ShowStackToolWindow()' --> 'ShowIDStackToolWindow()'. 'IM_OFFSETOF()' --> 'offsetof()'.
  - 2026/01/07 (1.92.6) - Popups: changed compile-time 'ImGuiPopupFlags popup_flags = 1' default value to be '= 0' for BeginPopupContextItem(), BeginPopupContextWindow(), BeginPopupContextVoid(), OpenPopupOnItemClick(). Default value has same meaning before and after.
                          - Refer to GitHub topic #9157 if you have any question.
@@ -4377,6 +4380,7 @@ ImGuiContext::ImGuiContext(ImFontAtlas* shared_font_atlas)
     SettingsLoaded = false;
     SettingsDirtyTimer = 0.0f;
     HookIdNext = 0;
+    DemoMarkerCallback = NULL;
 
     memset(LocalizationTable, 0, sizeof(LocalizationTable));
 
@@ -5180,6 +5184,13 @@ void ImGui::MemFree(void* ptr)
     return (*GImAllocatorFreeFunc)(ptr, GImAllocatorUserData);
 }
 
+void ImGui::DemoMarker(const char* file, int line, const char* section)
+{
+    ImGuiContext& g = *GImGui;
+    if (g.DemoMarkerCallback != NULL)
+        g.DemoMarkerCallback(file, line, section);
+}
+
 // We record the number of allocation in recent frames, as a way to audit/sanitize our guiding principles of "no allocations on idle/repeating frames"
 void ImGui::DebugAllocHook(ImGuiDebugAllocInfo* info, int frame_count, void* ptr, size_t size)
 {