Update settings.html

settings.html

@@ -10,14 +10,15 @@
 
 <style>
 
-#form_ph input[type="number"]::-webkit-inner-spin-button, 
-input[type="number"]::-webkit-outer-spin-button {
-  -webkit-appearance: inner-spin-button;
-  opacity: 1;
+#form_ph input[type="number"] {
+  position: relative;
 }
 
-input[type="number"] {
-  -moz-appearance: textfield;
+.custom-spinner {
+  position: absolute;
+  top: 0;
+  right: 0;
+  height: 100%;
 }
 
 </style>