Stack Tool: Added Stack Tool (ShowStackToolWindow() function and avai…

…lable from Demo and Metrics window). (#4631)

docs/CHANGELOG.txt

@@ -42,6 +42,10 @@ Breaking Changes:
 
 Other Changes:
 
+- Debug: Stack Tool: Added "Stack Tool" available in "Demo->Examples->Stack Tool", "Metrics->Tools",
+  or by calling the ShowStackToolWindow() function. The tool run queries on hovered id to display
+  details about individual components that were hashed to create an ID. It helps understanding
+  the ID stack system and debugging potential ID collisions. (#4631) [@ocornut, @rokups]
 - Windows: Fixed background order of overlapping childs submitted sequentially. (#4493)
 - IsWindowFocused: Added ImGuiFocusedFlags_NoPopupHierarchy flag allowing to exclude child popups
   from the tested windows when combined with _ChildWindows.

imconfig.h

@@ -33,7 +33,7 @@
 // It is very strongly recommended to NOT disable the demo windows during development. Please read comments in imgui_demo.cpp.
 //#define IMGUI_DISABLE                                     // Disable everything: all headers and source files will be empty.
 //#define IMGUI_DISABLE_DEMO_WINDOWS                        // Disable demo windows: ShowDemoWindow()/ShowStyleEditor() will be empty. Not recommended.
-//#define IMGUI_DISABLE_METRICS_WINDOW                      // Disable metrics/debugger window: ShowMetricsWindow() will be empty.
+//#define IMGUI_DISABLE_METRICS_WINDOW                      // Disable metrics/debugger and other debug tools: ShowMetricsWindow() and ShowStackToolWindow() will be empty.
 
 //---- Don't implement some functions to reduce linkage requirements.
 //#define IMGUI_DISABLE_WIN32_DEFAULT_CLIPBOARD_FUNCTIONS   // [Win32] Don't implement default clipboard handler. Won't use and link with OpenClipboard/GetClipboardData/CloseClipboard etc. (user32.lib/.a, kernel32.lib/.a)