Allow tapping/clicking outside popup to close it

www/css/app.css

@@ -77,6 +77,14 @@ file, You can obtain one at http://mozilla.org/MPL/2.0/.
     background: rgba(0,0,0,0.75);
 }
 
+.popup-backdrop {
+    /*
+    We want the backdrop to exist to enable closing on tap,
+    but IMO it's better when it's totally transparent
+    */
+    background: rgba(0,0,0,0);
+}
+
 #web-barcode-ui.hidden {
     display: none;
 }

www/js/main.js

@@ -21,7 +21,7 @@ var app = new Framework7({
         swipeToClose: false
     },
     popup: {
-        backdrop: false
+        backdrop: true
     },
     init: true,
     initOnDeviceReady: false,