[IMP]improve help of setting/configuration menus
[IMP]improve help of sales and General-setting menus in setting/configuration
[MERGE]merged with main addons
[MERGE]merged with main addons
[IMP]Add - before the the sentence This installs the module in help
[IMP]improve help in setting/configuration/sales
[MERGE]merged with main addons
[IMP]align multi-line string
[IMP] addons: cleaned spaces and indentation of help messages of various res_config fields