shows warning dialog when exporting with metadata problems

Runs for #2054 ✅ E2E-test Android app

• 6d6fbea ✔ Run #92843154863 15s on chromium WIP by Gwenn Le Bihan 3 hours ago
• 27ca03a ✔ Run #92157195699 11s on chromium WIP by Gwenn Le Bihan 3 days ago
• 8f5826a ✔ Run #92150777780 15s on chromium WIP by Gwenn Le Bihan 3 days ago
• 0cc47a8 ✔ Run #92146164634 15s on chromium WIP by Gwenn Le Bihan 3 days ago
• 32831ba ✔ Run #92142765748 15s on chromium WIP by Gwenn Le Bihan 3 days ago
• c94dce2 ✔ Run #92135539170 15s on chromium WIP by Gwenn Le Bihan 3 days ago
• 135ec9c ✔ Run #92132664933 14s on chromium WIP by Gwenn Le Bihan 3 days ago
• 905a9f1 ✔ Run #92127171414 12s on chromium WIP by Gwenn Le Bihan 3 days ago
• 026e164 ✔ Run #92121187182 14s on chromium WIP by Gwenn Le Bihan 3 days ago
• abd4ca1 ✔ Run #92117522639 15s on chromium WIP by Gwenn Le Bihan 3 days ago
• 21ad205 ✔ Run #92001741337 15s on chromium WIP by Gwenn Le Bihan 3 days ago
• f5dae93 ✔ Run #91991793953 15s on chromium WIP by Gwenn Le Bihan 3 days ago
• 89b297a ✔ Run #91844748452 14s on chromium WIP by Gwenn Le Bihan 4 days ago
• 8107142 ✔ Run #91839863516 14s on chromium WIP by Gwenn Le Bihan 4 days ago
• aed4a00 ✔ Run #91837494936 14s on chromium WIP by Gwenn Le Bihan 4 days ago
• 0ada66a ✔ Run #91833261193 15s on chromium WIP by Gwenn Le Bihan 4 days ago