electron app: switch back to electron 11.2 / chrome 87 to keep flash plugin support

bump version to 1.3.6

ui.js

@@ -367,7 +367,7 @@ const oe=new WeakMap,ne=v(e=>t=>{if(!(t instanceof P))throw new Error("unsafeSVG
                   <div style="display: flex">
                     <div class="has-text-centered" style="width: 220px">
                       <wr-anim-logo class="logo" size="48px"></wr-anim-logo>
-                      <div style="font-size: smaller; margin-bottom: 1em">${pe?"App":""} v${"1.3.6-alpha.0"}</div>
+                      <div style="font-size: smaller; margin-bottom: 1em">${pe?"App":""} v${"1.3.6"}</div>
                     </div>
 
                     ${pe?q`
@@ -1146,7 +1146,7 @@ const oe=new WeakMap,ne=v(e=>t=>{if(!(t instanceof P))throw new Error("unsafeSVG
               <a href="#" role="button" class="dropdown-item" @click="${this.onAbout}">
                 <fa-icon class="menu-logo" size="1.0rem" aria-hidden="true" .svg=${this.appLogo}></fa-icon>
                 <span>&nbsp;About ${this.appName}</span>
-                <span class="menu-version">(${"1.3.6-alpha.0"})</span>
+                <span class="menu-version">(${"1.3.6"})</span>
               </a>
             </div>
           </div>