fix take screenshot button state

Summary: Take screenshot button state is not reset after screenshot taken. So Flipper can only take 1 screenshot per session.

Reviewed By: mweststrate

Differential Revision: D31018526

fbshipit-source-id: dc7b00f26c77ec94a8a15047f5ae835acdb710c7

desktop/app/src/chrome/ScreenCaptureButtons.tsx

@@ -71,8 +71,11 @@ export default function ScreenCaptureButtons() {
         console.error('Taking screenshot failed:', e);
         message.error('Taking screenshot failed:' + e);
       })
-      .finally(() => {});
+      .finally(() => {
+        setIsTakingScreenshot(false);
+      });
   }, [selectedDevice]);
+
   const handleRecording = useCallback(() => {
     if (!selectedDevice) {
       return;