Update wizard-admin.scss

assets/stylesheets/common/wizard-admin.scss

@@ -282,6 +282,17 @@
       }
     }
     
+    &.field-mapper-setting {
+      .setting-value {
+        max-width: calc(100% - 80px);
+        
+        .mapper-input {
+          max-width: 100%;
+          box-sizing: border-box;
+        }
+      }
+    }
+
     label {
       margin: 3px 0;
     }