chore: improved stock actions layout; added stock bookmarking

src/locales/en.json

@@ -52,6 +52,8 @@
     "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):",
+    "prompt-bookmark": "Enter the name of this composition:",
+    "prompt-bookmark-overwrite": "A composition with this name is already bookmarked! Do you want to overwrite it?",
     "vehicle-no": "VEHICLE NO.",
     "no-vehicle-chosen": "NO VEHICLE CHOSEN",
     "action-move-up": "MOVE UP",
@@ -63,6 +65,7 @@
     "action-copy": "COPY TO CLIPBOARD",
     "action-reset": "RESET",
     "action-shuffle": "SHUFFLE",
+    "action-bookmark": "BOOKMARK",
     "mass": "Mass",
     "mass-accepted": "accepted",
     "length": "Length",