Separate translations for each plugin

[mdictionary] / src / plugins / xdxf / xdxf.qrc

<RCC>
    <qresource prefix="/icons">
        <file>xdxf.png</file>
    </qresource>
    <qresource prefix="/">
        <file>translations/dict_xdxf_en.qm</file>
        <file>translations/dict_xdxf_pl.qm</file>
    </qresource>
</RCC>