bug(mac): no animation to indicate package added or removed

[sgschantz]

Describe the bug

When a package is added or removed using Keyman Configuration, there is no clear animation as the item is removed or added from the list. This makes it harder to tell what was changed by the action, especially if the user has several packages installed.

Keyman apps

• Keyman for Android
• Keyman for iPhone and iPad
• Keyman for Linux
• Keyman for macOS
• Keyman for Windows
• Keyman Developer
• KeymanWeb
• Other - give details at bottom of form

Keyman version

alpha 19