Tables: revert setting colum cliprect.max.x to WorkMax.x instead of Max.x at it complicates header code. Fix clipped sort arrow. (amend 17536f9a)

imgui_tables.cpp

@@ -925,6 +925,7 @@ void ImGui::TableUpdateLayout(ImGuiTable* table)
         // Lock all our positions
         // - ClipRect.Min.x: Because merging draw commands doesn't compare min boundaries, we make ClipRect.Min.x match left bounds to be consistent regardless of merging.
         // - ClipRect.Max.x: using WorkMaxX instead of MaxX (aka including padding) makes things more consistent when resizing down, tho slightly detrimental to visibility in very-small column.
+        // - ClipRect.Max.x: using MaxX makes it easier for header to receive hover highlight with no discontinuity and display sorting arrow.
         // - FIXME-TABLE: We want equal width columns to have equal (ClipRect.Max.x - WorkMinX) width, which means ClipRect.max.x cannot stray off host_clip_rect.Max.x else right-most column may appear shorter.
         column->MinX = offset_x;
         column->MaxX = offset_x + column->WidthGiven + table->CellSpacingX1 + table->CellSpacingX2 + table->CellPaddingX * 2.0f;
@@ -933,7 +934,7 @@ void ImGui::TableUpdateLayout(ImGuiTable* table)
         column->ItemWidth = ImFloor(column->WidthGiven * 0.65f);
         column->ClipRect.Min.x = column->MinX;
         column->ClipRect.Min.y = work_rect.Min.y;
-        column->ClipRect.Max.x = column->WorkMaxX; //column->MaxX;
+        column->ClipRect.Max.x = column->MaxX; //column->WorkMaxX;
         column->ClipRect.Max.y = FLT_MAX;
         column->ClipRect.ClipWithFull(host_clip_rect);