add help menu visual callout

web/kiri/index.css

@@ -242,6 +242,13 @@ details[open] summary::after {
     font-size: larger;
 }
 
+#app-help-me {
+    position: absolute;
+    top: 3px;
+    right: -2px;
+    font-size: 10px;
+}
+
 /** dark conversion */
 .dark button[disabled] {
     color: #888;

web/kiri/index.html

@@ -63,7 +63,7 @@
         <div class="grow"></div>
         <div id="app-name" class="f-col a-center top-menu">
             <span class="grow">
-                <span id="app-name-text" class="km-font">Kiri:Moto</span>
+                <span id="app-name-text" class="km-font">Kiri:Moto<div id="app-help-me"><i class="fas fa-question-circle"></i></div></span>
                 <div id="app-name-pop" class="top-menu-drop top-menu-center">
                     <div class="content">
                         <div id="app-help">