Merge remote-tracking branch 'origin/3.2'

1. Conflicts:
2. CMakeLists.txt
3. src/items/check/check.json
4. src/items/field/field.json
5. src/items/image/image.json
6. src/items/label/label.json
7. src/items/text/text.json
8. src/plugins/barcode/kreport_barcodeplugin.json
9. src/plugins/chart/kreport_chartplugin.json
10. src/plugins/maps/kreport_mapsplugin.json
11. src/plugins/web/kreport_webplugin.json