Add step=any to numeric inputs

This stops Firefox from complaining that the values
are not integers.

macrovision.html

@@ -177,7 +177,7 @@
           World height
         </div>
         <div class="options-row">
-          <input class="options-field-numeric" type="number" id="options-height-value" min="1" value="10">
+          <input class="options-field-numeric" type="number" id="options-height-value" min="1" value="10" step="any">
           <select class="options-field-unit" id="options-height-unit">
           </select>
         </div>

macrovision.js

@@ -1352,6 +1352,7 @@ function configEntityOptions(entity, view) {
 
     scaleInput.setAttribute("min", 1);
     scaleInput.setAttribute("type", "number");
+    scaleInput.setAttribute("step", "any");
     setNumericInput(scaleInput, entity.scale);
 
     scaleRow.appendChild(scaleInput);
@@ -1464,6 +1465,7 @@ function configViewOptions(entity, view) {
         input.classList.add("options-field-numeric");
         input.id = "options-view-" + key + "-input";
         input.setAttribute("type", "number");
+        input.setAttribute("step", "any");
         input.setAttribute("min", 1);
 
         const select = document.createElement("select");