Add setHardwareModeTooltip(), fix webmanifest src attr

app/icons/site.webmanifest

@@ -3,7 +3,7 @@
     "short_name": "RaspAP",
     "icons": [
         {
-            "src": "/dist/icons/android-chrome-192x192.png",
+            "src": "/app/icons/android-chrome-192x192.png",
             "sizes": "192x192",
             "type": "image/png"
         }

app/js/custom.js

@@ -183,6 +183,7 @@ function contentLoaded() {
             break;
         case "hostapd_conf":
             loadChannel();
+            setHardwareModeTooltip();
             break;
         case "dhcpd_conf":
             loadInterfaceDHCPSelect();
@@ -387,6 +388,17 @@ function loadChannelSelect(selected) {
     });
 }
 
+/* Sets hardware mode tooltip text for selected interface.
+ * Messages are sent from ajax request for gettext locale support.
+ */
+function setHardwareModeTooltip() {
+    var iface = $('#cbxinterface').val();
+    $.post('ajax/networking/get_frequencies.php?',{'interface': iface},function(data){
+        responseText = JSON.parse(data);
+        $('#tiphwmode').attr('data-original-title', responseText);
+    });
+}
+
 /* Updates the selected blocklist
  * Request is passed to an ajax handler to download the associated list.
  * Interface elements are updated to indicate current progress, status.