[Improvement] Add a loading throbber

[defaultUser822]

Hello. I think adding a throbber while the store is loading would be a nice addition, especially terms of UX. The absence of a throbber is particularly noticeable when internet is slow.

The loading throbber in the Linux Mint software manager:

softwman.mp4

Current COSMIC store loading behavior:

COSMICstore.mp4

[defaultUser822]

Friendly reminder: After #482 is merged, this issue should be closed.

[jacobgkau]

Thanks for keeping track of this. I've just consolidated it with an older issue for the same thing.

[defaultUser822]

Thanks for keeping track of this. I've just consolidated it with an older issue for the same thing.

You are welcome. Alright.