SwiftUI

Gifski requires at least 2 frames in the resulting GIF, but users might accidentally trim or choose low enough FPS for the resulting GIF to contain less than 2 frames. We should show a warning in the editor's view in that case.

Right now, we just show an error when the conversion starts:

<img width="472" alt="Screen Shot 2020-10-24 at 16 53 31" src="https://user-images.githubusercontent.com/

Describe the bug
The inspector sidebar should fill the available window height.

To Reproduce
Steps to reproduce the behavior:

1. Open a project
2. Notice that the inspector sidebar is below toolbar and does not fill the available window height

Expected behavior
The inspector sidebar should include the toolbar to fill the available window height.

Screenshots
<img widt

Sessions currently live forever :-) This "just" needs a proper timer.

Someone could fork https://github.com/sindresorhus/plash-bing-photo-of-the-day and adapt it for other services.

For example:

• Pexels - Curated photo: https://www.pexels.com/api/documentation/#photos-curated
• Pexels - Search: https://www.pexels.com/api/documentation/#photos-search
• Pixabay - Search: https://pixabay.com/api/docs/#api_search_images

Contributions welcome. Jus