Scrollbar: Shift+Click always use absolute positionning scroll. (#8002, #7328)

docs/CHANGELOG.txt

@@ -43,6 +43,8 @@ Breaking changes:
 
 Other changes:
 
+- Scrollbar: Shift+Click always use absolute positionning scroll (which was the default
+  before 1.90.8). (#8002, #7328)
 - Backends: SDL3: Update for API changes: SDL_bool removal. SDL_INIT_TIMER removal.
 
 

imgui_widgets.cpp

@@ -1000,8 +1000,8 @@ bool ImGui::ScrollbarEx(const ImRect& bb_frame, ImGuiID id, ImGuiAxis axis, ImS6
         if (g.ActiveIdIsJustActivated)
         {
             // On initial click calculate the distance between mouse and the center of the grab
-            g.ScrollbarSeekMode = (short)held_dir;
-            g.ScrollbarClickDeltaToGrabCenter = (g.ScrollbarSeekMode == 0.0f) ? clicked_v_norm - grab_v_norm - grab_h_norm * 0.5f : 0.0f;
+            g.ScrollbarSeekMode = g.IO.KeyShift ? 0 : (short)held_dir;
+            g.ScrollbarClickDeltaToGrabCenter = (g.ScrollbarSeekMode == 0 && !g.IO.KeyShift) ? clicked_v_norm - grab_v_norm - grab_h_norm * 0.5f : 0.0f;
         }
 
         // Apply scroll (p_scroll_v will generally point on one member of window->Scroll)