Log/Capture: Fixes for handling \n in strings. Improve the look of various widgets. Added LogSetNextTextDecoration helper. Fixup/amend dbaf74d75.

For now removed LogRenderedTextNewLine() - it is eventually desirable but currently carries too much ambiguities, so reverted until we have a better system and test suite.

imgui_tables.cpp

@@ -1654,6 +1654,10 @@ void ImGui::TableEndRow(ImGuiTable* table)
     if (table->CurrentColumn != -1)
         TableEndCell(table);
 
+    // Logging
+    if (g.LogEnabled)
+        LogRenderedText(NULL, "|");
+
     // Position cursor at the bottom of our row so it can be used for e.g. clipping calculation. However it is
     // likely that the next call to TableBeginCell() will reposition the cursor to take account of vertical padding.
     window->DC.CursorPos.y = table->RowPosY2;
@@ -1890,6 +1894,14 @@ void ImGui::TableBeginCell(ImGuiTable* table, int column_n)
         SetWindowClipRectBeforeSetChannel(window, column->ClipRect);
         table->DrawSplitter.SetCurrentChannel(window->DrawList, column->DrawChannelCurrent);
     }
+
+    // Logging
+    ImGuiContext& g = *GImGui;
+    if (g.LogEnabled && !column->IsSkipItems)
+    {
+        LogRenderedText(&window->DC.CursorPos, "|");
+        g.LogLinePosY = FLT_MAX;
+    }
 }
 
 // [Internal] Called by TableNextRow()/TableSetColumnIndex()/TableNextColumn()