Contribute to international translation [need help]

[hustlei]

thanks for anyone to contribute the international translation. now English, Chinese are exist, russian needs to be updated. welcome to add other language translation.

the way to contribute is as follow:

1. find the English.ts file in installer\i18n under the QssStylesheetEditor source code directory.
2. find every <message> tag and translate the content in <source> to target lang fill in the <translation> tag.
3. rename the .ts file then commit and Pull Request to github.

<message>
    <source>English text</source>
    <translation>translated target lang text</translation>
</message>