hide extruder selector outside of FDM mode

js/kiri.js

@@ -997,6 +997,7 @@ self.kiri.copyright = exports.COPYRIGHT;
 
     function platformUpdateSelected() {
         UI.selection.style.display = platform.selected_count() ? 'inline' : 'none';
+        $('ext-sel').style.display = (MODE === MODES.FDM) ? 'inline' : 'none';
         let extruders = settings.device.extruders;
         if (extruders) {
             for (let i=0; i<extruders.length; i++) {
@@ -1882,6 +1883,7 @@ self.kiri.copyright = exports.COPYRIGHT;
         // if (MODE !== MODES.FDM) platform.layout();
         if (then) then();
         triggerSettingsEvent();
+        platformUpdateSelected();
     }
 
     function currentDeviceName() {

web/kiri/index.html

@@ -203,7 +203,7 @@
                     </table>
                 </div>
             </span>
-            <span class="sel-span">
+            <span id="ext-sel" class="sel-span">
                 <label class="label">extruder</label>
                 <div class="sel-pop"><div id="sel-ext"></div></div>
             </span>