ButtonBehavior: Fixed ImGuiButtonFlags_NoHoldingActiveID from incorrectly setting ActiveIdClickOffset, which probably have no known effect, but it is more correct this way. (#1418)

imgui.cpp

@@ -5835,12 +5835,16 @@ bool ImGui::ButtonBehavior(const ImRect& bb, ImGuiID id, bool* out_hovered, bool
             {
                 pressed = true;
                 if (flags & ImGuiButtonFlags_NoHoldingActiveID)
+                {
                     ClearActiveID();
+                }
                 else
+                {
                     SetActiveID(id, window); // Hold on ID
-                FocusWindow(window);
                     g.ActiveIdClickOffset = g.IO.MousePos - bb.Min;
                 }
+                FocusWindow(window);
+            }
             if ((flags & ImGuiButtonFlags_PressedOnRelease) && g.IO.MouseReleased[0])
             {
                 if (!((flags & ImGuiButtonFlags_Repeat) && g.IO.MouseDownDurationPrev[0] >= g.IO.KeyRepeatDelay))  // Repeat mode trumps <on release>