Tables: fixed TableHeader() eager vertical clipping of text. (#6236)

docs/CHANGELOG.txt

@@ -76,6 +76,8 @@ Other changes:
     - The feature is unlikely to ever work properly when using a coarse clipper
       such as ImGuiListClipper.
 - TreeNode: fixed incorrect clipping of arrow/bullet when using ImGuiTreeNodeFlags_SpanAllColumns.
+- Tables: fixed TableHeader() eager vertical clipping of text which may be noticeable
+  with FramePadding.y was too small. (#6236)
 - Tabs: fixes small issues with how "..." ellipsis moved depending on visibility
   of Close Button or Unsaved Document marker. (#8387)
 - Nav: fixed assertion when holding gamepad FaceLeft/West button to open

imgui_tables.cpp

@@ -3275,7 +3275,7 @@ void ImGui::TableHeader(const char* label)
     // Render clipped label. Clipping here ensure that in the majority of situations, all our header cells will
     // be merged into a single draw call.
     //window->DrawList->AddCircleFilled(ImVec2(ellipsis_max, label_pos.y), 40, IM_COL32_WHITE);
-    RenderTextEllipsis(window->DrawList, label_pos, ImVec2(ellipsis_max, label_pos.y + label_height + g.Style.FramePadding.y), ellipsis_max, label, label_end, &label_size);
+    RenderTextEllipsis(window->DrawList, label_pos, ImVec2(ellipsis_max, bb.Max.y), ellipsis_max, label, label_end, &label_size);
 
     const bool text_clipped = label_size.x > (ellipsis_max - label_pos.x);
     if (text_clipped && hovered && g.ActiveId == 0)