front: convert rem to px

Signed-off-by: Theo Macron <theo.macron0315@gmail.com>

Author: Akctarus

front/src/styles/scss/applications/operationalStudies/_managetrainschedule.scss

@@ -4,11 +4,11 @@
     align-items: center;
     width: 100%;
     .rolling-stock {
-      width: 3rem;
+      width: 48px;
       overflow: hidden;
-      padding-bottom: 0.25rem;
+      padding-bottom: 4px;
         img {
-          height: 1rem;
+          height: 16px;
           object-fit: cover;
           object-position: left;
           transform: scaleX(-1);
@@ -17,7 +17,7 @@
         }
     }
     img {
-      height: 1.5rem;
+      height: 24px;
     }
   }
 }