Update NWjs to 0.64

Author: haslinghuis

gulpfile.js

@@ -48,7 +48,7 @@ const NODE_ENV = process.env.NODE_ENV || 'production';
 const NAME_REGEX = /-/g;
 
 const nwBuilderOptions = {
-    version: '0.62.0',
+    version: '0.64.0"',
     files: `${DIST_DIR}**/*`,
     macIcns: './src/images/bf_icon.icns',
     macPlist: { 'CFBundleDisplayName': 'Betaflight Configurator'},

src/css/dark-theme.css

@@ -518,10 +518,10 @@ progress[value]::-webkit-progress-bar {
     border-bottom: 1px solid red;
 }
 
-.tab-osd .preview {
+/* .tab-osd .preview {
     background: linear-gradient(rgba(0, 0, 0, 0.2), rgba(0, 0, 0, 0.2)), url(../images/osd-bg-1.jpg);
     background-size: cover;
-}
+} */
 
 .tab-osd .preview:active {
     background: linear-gradient(rgba(0, 0, 0, 0.2), rgba(0, 0, 0, 0.2)), url(../../images/osd-bg-1-grid.png), url(../../images/osd-bg-1.jpg);