Update style, enhance mobile support

wwwroot/css/form.css

@@ -72,6 +72,7 @@
   flex: 1;
   display: flex;
   gap: var(--badge-spacing);
+  overflow: hidden;
 }
 
 .custom-command-fields .cmd-name {
@@ -116,7 +117,7 @@
 
 .checkbox-hint {
   opacity: 0.5;
-  font-size: 0.85em;
+  font-size: var(--font-size);
 }
 
 .danger-btn {