Fix upload large file sizes bug

Created by: Tirokk

Authored by aonomike May 28, 2019 Merged Jun 2, 2019

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🍰 Pullrequest

• Increase the minimum accepted image size to 3 MB
• Display toast with error message if maximum size is exceeded
• Resolve double upload submit to the backend

Issues

• fixes #691 (closed)
• fixes #687 (closed)

Todo

• Force update the image component to display the initial image