Add new translation file to CMakeLists.txt. Update docs.

docs/modders/Translations.md

@@ -82,6 +82,7 @@ VCMI Launcher and Map Editor use translation system provided by Qt framework so
 
 - Install Qt Linguist. You can find find standalone version here: https://download.qt.io/linguist_releases/
 - Open `<VCMI Sources>/launcher/translation/` directory, copy `english.ts` file and rename it to your language
+- Open `<VCMI Sources>/launcher/CMakeLists.txt` file with a text editor. In there you need to find list of existing translation files and add new file to the list.
 - Launch Qt Linguist, select Open and navigate to your copied file
 - Select any untranslated string, enter translation in field below, and click "Done and Next" (Ctrl+Return) to navigate to next untranslated string
 - Once translation has been finished, save resulting file.

launcher/CMakeLists.txt

@@ -83,6 +83,7 @@ set(launcher_TS
 	"${translationsDir}/portuguese.ts"
 	"${translationsDir}/russian.ts"
 	"${translationsDir}/spanish.ts"
+	"${translationsDir}/swedish.ts"
 	"${translationsDir}/ukrainian.ts"
 	"${translationsDir}/vietnamese.ts"
 )