feat: Translate frontend/src/i18n/en.json in sv_SE

89% of minimum 50% translated source file: 'frontend/src/i18n/en.json'
on 'sv_SE'.

Sync of partially translated files: 
untranslated content is included with an empty translation 
or source language content depending on file format

frontend/src/i18n/sv-se.json

@@ -142,7 +142,7 @@
     "size": "Storlek",
     "upload": "Ladda upp",
     "uploadFiles": "Laddar upp {files} filer...",
-    "uploadMessage": "Select an option to upload.",
+    "uploadMessage": "Välj ett alternativ att ladda upp.",
     "optionalPassword": "Optional password",
     "resolution": "Resolution",
     "discardEditorChanges": "Are you sure you wish to discard the changes you've made?"