Hold TagInfo::Owner in shared_ptr

Fill usage help topic

Introduce help

Increment revision number

Get and set values by ConfigFieldId in ConfigDataMapper

Implement default button in ConfigValueDialog

Configure plugin with config menu

Modify selected value with ConfigValueDialog

Add missing virtual destructors to ConfigStreamReader and ConfigStreamWriter

Implement config menu

Use ConfigDataMapper and ConfigStreamWriter to modify config

Implement ConfigDataWriter interface

Specify config file location in error messages

Catch exceptions of LoadConfig in OpenW and SetStartupInfoW

Validate config key in ParseKey