Call for testing: ubuntu-frame (bugfixes for the `20` and `22` tracks)

[saviq]

Ubuntu Frame was updated in the following channels:

channel	version
22/candidate	121-mir2.15.0
20/candidate	104-mir2.13.0
latest/candidate	104-mir2.13.0

They contain fixes for the following issues:

• #151: 50% success rate of the app starting
• #149: Miscalculated diagnostic width when using multibyte characters
• #155/#156: snap: use snapctl model to determine if Classic

To test, just switch to the candidate channel. For example:

snap refresh --channel 22/candidate ubuntu-frame

And use as normal. Please let us know any results here.

If no problems are identified we aim to promote to stable in a week.

[cluemaster]

We tested channel 22/candidate for ubuntu-frame with our snaps and everything seems to be working correctly. We will continue to test restarts, snap refreshes, etc.