update window icon style

source/app.entry.js

@@ -253,6 +253,7 @@ ipcRenderer
       height:130,
       width:280
     });
+    win.win.setIconCss("update-winicon");
     win.win.button("minmax").hide();
     win.win.denyResize();
     let uplayout = win.win.attachLayout('1C');

static/css/index.css

@@ -42,6 +42,9 @@ html, body, #container, #loading {
   font-size: 100px;
   text-align: center;
 }
+.dhxwins_vp_dhx_skyblue div.dhxwin_hdr div.update-winicon {
+  background-image: url("ant-static://imgs/cloud-download.svg");
+}
 
 /*update-loading*/
 

static/imgs/cloud-download.svg

+<svg aria-hidden="true" data-prefix="fas" data-icon="cloud-download-alt" class="svg-inline--fa fa-cloud-download-alt fa-w-20" role="img" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 640 512"><path fill="currentColor" d="M537.6 226.6c4.1-10.7 6.4-22.4 6.4-34.6 0-53-43-96-96-96-19.7 0-38.1 6-53.3 16.2C367 64.2 315.3 32 256 32c-88.4 0-160 71.6-160 160 0 2.7.1 5.4.2 8.1C40.2 219.8 0 273.2 0 336c0 79.5 64.5 144 144 144h368c70.7 0 128-57.3 128-128 0-61.9-44-113.6-102.4-125.4zm-132.9 88.7L299.3 420.7c-6.2 6.2-16.4 6.2-22.6 0L171.3 315.3c-10.1-10.1-2.9-27.3 11.3-27.3H248V176c0-8.8 7.2-16 16-16h48c8.8 0 16 7.2 16 16v112h65.4c14.2 0 21.4 17.2 11.3 27.3z"></path></svg>
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