BeginGroup() extra comment because this is overused and misleading (#608)

imgui.cpp

@@ -8813,6 +8813,7 @@ bool ImGui::IsRectVisible(const ImVec2& size)
     return window->ClipRect.Overlaps(ImRect(window->DC.CursorPos, window->DC.CursorPos + size));
 }
 
+// Lock horizontal starting position + EndGroup() wraps group bounding box into one "item" (so you can use IsItemHovered() on a group, SameLine() between groups, etc.)
 void ImGui::BeginGroup()
 {
     ImGuiWindow* window = GetCurrentWindow();
@@ -9056,7 +9057,6 @@ void ImGui::Columns(int columns_count, const char* id, bool border)
             {
                 if (g.ActiveIdIsJustActivated)
                     g.ActiveClickDeltaToCenter.x = x - g.IO.MousePos.x;
-
                 x = GetDraggedColumnOffset(i);
                 SetColumnOffset(i, x);
             }

imgui.h

@@ -187,14 +187,14 @@ namespace ImGui
     IMGUI_API void          PopButtonRepeat();
 
     // Cursor / Layout
-    IMGUI_API void          BeginGroup();                                                       // lock horizontal starting position. once closing a group it is seen as a single item (so you can use IsItemHovered() on a group, SameLine() between groups, etc.
-    IMGUI_API void          EndGroup();
     IMGUI_API void          Separator();                                                        // horizontal line
     IMGUI_API void          SameLine(float pos_x = 0.0f, float spacing_w = -1.0f);              // call between widgets or groups to layout them horizontally
     IMGUI_API void          Spacing();                                                          // add spacing
     IMGUI_API void          Dummy(const ImVec2& size);                                          // add a dummy item of given size
     IMGUI_API void          Indent();                                                           // move content position toward the right by style.IndentSpacing pixels
     IMGUI_API void          Unindent();                                                         // move content position back to the left (cancel Indent)
+    IMGUI_API void          BeginGroup();                                                       // lock horizontal starting position + EndGroup() wraps group bounding box into one "item" (so you can use IsItemHovered() on a group, SameLine() between groups, etc.)
+    IMGUI_API void          EndGroup();
     IMGUI_API ImVec2        GetCursorPos();                                                     // cursor position is relative to window position
     IMGUI_API float         GetCursorPosX();                                                    // "
     IMGUI_API float         GetCursorPosY();                                                    // "