add mobile ICE settings reset

public/index.html

@@ -126,6 +126,7 @@
   <button class="ctl mirror-mic" title="Toggle mic (M)"><span class="material-symbols-outlined">mic</span></button>
   <button class="ctl mirror-deafen" title="Toggle deafen (D)"><span class="material-symbols-outlined">headphones</span></button>
   <button class="ctl mirror-share" title="Share your screen (S)"><span class="material-symbols-outlined">present_to_all</span></button>
+  <button id="btn-reset-ice-mobile" class="ctl" title="Reset saved ICE settings"><span class="material-symbols-outlined">restart_alt</span></button>
 </div>
 
 <!-- settings modal -->