build electron app

implement new fetch api calls
use typescript

src/elements/Popups/PopupBase.test.js

@@ -8,5 +8,19 @@ describe('<PopupBase/>', function () {
         wrapper.unmount();
     });
 
+    it('simulate keypress', function () {
+        let events = [];
+        document.addEventListener = jest.fn((event, cb) => {
+            events[event] = cb;
+        });
+
+        const func = jest.fn();
+        shallow(<PopupBase onHide={() => func()}/>);
+
+        // trigger the keypress event
+        events.keyup({key: 'Escape'});
+
+        expect(func).toBeCalledTimes(1);
+    });
 
 });