Calibration snapshot counter displays "0" after webpage is reloaded during calibration.

[crschardt]

Describe the bug
Pull request #1593 allows reloading the webpage during calibration, however there is a remaining glitch where the snapshot count will display "0" after the reload, even if snapshots have been collected. Taking another snapshot then displays the correct number of snapshots and, when enough snapshots are recorded, calibration can complete successfully.

To Reproduce
Steps to reproduce the behavior:

1. Open the UI "Camera" Tab.
2. Start a calibration.
3. Take 2 Snapshots. The counter will display "Snapshots: 2 of at least 12".
4. Reload the webpage. The counter will display "Snapshots: 0 of at least 12".
5. Take another snapshot. The counter will display "Snapshots: 3 of at least 12".

Screenshots / Videos
After taking 2 snapshots:

After reloading the web page:

After taking a third snapshot:

Additional context
This is a pretty minor problem and is being added so that we don't loose track of it after Matt merges #1593.