Feature: Add progress ring to properties when calculating sizes

[Josh65-2201]

What's the Problem?

There used to be a loading icon when sizes were calculated which now doesnt appear and causes some confusion. See #8585

Requirements

• Display progress ring next to the size labels to indicate when they are still loading

Files Version

2.1.15.0

Windows Version

No response

Comments

No response

[Josh65-2201]

for larger folders it does end up stoping seeming like its done if the user doesnt rember or know that the bytes will show when its actually done

[cinqmilleans]

@yaichenbaum We better indicate if the calculation is in progress.

1. It is possible that the calculation seems to stop but then resumes. For example if the calculation in progress examines a subfolder that contains many very small files and the size given is an order of magnitude larger.
2. If the displayed size comes from the cache, it is never decreased until the calculation is finished (only increased). This is a current limitation that should be fixed when the cache is persistent. But even in this case, the calculation may take a moment before detecting a subfolder whose size has changed.