chore: added a display of the timetable max speed in the active train info & tooltip

src/styles/_global.scss

@@ -225,6 +225,12 @@ ul {
   }
 }
 
+.font {
+  &--italic {
+    font-style: italic;
+  }
+}
+
 button,
 a.a-button {
   cursor: pointer;