fix: tłumaczenia alertów

src/locales/en.json

@@ -47,6 +47,9 @@
   },
   "stocklist": {
     "title": "STOCK EDITOR",
+    "alert-copied": "The rolling stock has been copied to your clipboard!",
+    "alert-empty": "Lista pojazdów jest pusta!",
+    "prompt-file": "Name a file and download it to the Presets folder (Documents/TTSK/TrainDriver2):",
     "vehicle-no": "VEHICLE NO.",
     "no-vehicle-chosen": "NO VEHICLE CHOSEN",
     "action-move-up": "MOVE UP",
@@ -88,6 +91,7 @@
   },
   "numgen": {
     "title": "TRAIN NUMBER GENERATOR",
+    "alert": "The number has been copied to your clipboard!",
     "start-region": "Beginning construction region",
     "end-region": "Terminating construction region",
     "train-category": "Train category",