Added full "Dear ImGui" prefix to the title of "Dear ImGui Demo" and "Dear ImGui Metrics" windows. Shortened amount of nodes in columns>tree demo.

docs/CHANGELOG.txt

@@ -54,12 +54,13 @@ Other Changes:
 - Scrollbar: Very minor bounding box adjustment to cope with various border size.
 - Style: Added style.WindowMenuButtonPosition (left/right, defaults to ImGuiDir_Left) to move the
   collapsing/docking button to the other side of the title bar.
-- Style: Made window close button cross is slightly smaller.
+- Style: Made window close button cross slightly smaller.
 - ImFontAtlas: FreeType: Added RasterizerFlags::Monochrome flag to disable font anti-aliasing. (#2545)
   Combine with RasterizerFlags::MonoHinting for best results.
 - ImFontGlyphRangesBuilder: Fixed unnecessarily over-sized buffer, which incidentally was also not
-  fully cleared. Fixed edge case overflow when adding character 0xFFFF. (#2568). [@NIKE3500]
+  fully cleared. Fixed edge-case overflow when adding character 0xFFFF. (#2568). [@NIKE3500]
-- Add native Mac clipboard copy/paste default implementation in core library to match what we are
+- Demo: Added full "Dear ImGui" prefix to the title of "Dear ImGui Demo" and "Dear ImGui Metrics" windows.
+- Backends: Add native Mac clipboard copy/paste default implementation in core library to match what we are
   dealing with Win32, and to facilitate integration in custom engines. (#2546) [@andrewwillmott]
 - Examples/Backends: Don't filter characters under 0x10000 before calling io.AddInputCharacter(),
   the filtering is done in io.AddInputCharacter() itself. This is in prevision for fuller Unicode

imgui.cpp

@@ -9730,7 +9730,7 @@ static void ImeSetInputScreenPosFn_DefaultImpl(int, int) {}
 
 void ImGui::ShowMetricsWindow(bool* p_open)
 {
-    if (!ImGui::Begin("ImGui Metrics", p_open))
+    if (!ImGui::Begin("Dear ImGui Metrics", p_open))
     {
         ImGui::End();
         return;

imgui_demo.cpp

@@ -246,7 +246,7 @@ void ImGui::ShowDemoWindow(bool* p_open)
     ImGui::SetNextWindowSize(ImVec2(550, 680), ImGuiCond_FirstUseEver);
 
     // Main body of the Demo window starts here.
-    if (!ImGui::Begin("ImGui Demo", p_open, window_flags))
+    if (!ImGui::Begin("Dear ImGui Demo", p_open, window_flags))
     {
         // Early out if the window is collapsed, as an optimization.
         ImGui::End();
@@ -2572,7 +2572,7 @@ static void ShowDemoWindowColumns()
             ImGui::NextColumn();
             if (open1)
             {
-                for (int y = 0; y < 5; y++)
+                for (int y = 0; y < 3; y++)
                 {
                     bool open2 = ImGui::TreeNode((void*)(intptr_t)y, "Node%d.%d", x, y);
                     ImGui::NextColumn();