Docker restart/pull handling updates. Minor refactoring.

[vorezal]

This PR:

• Skips restarting already restarted stacks
• Skips failed image pulls
• Moves some stuff around/minor refactoring to allow other bash functions to be used in the print_backups function

This is the first PR in my attempt to separate features in #262. A log feature only PR will follow eventually. This one is intended to address #260.

[mag37]

Nice one!
I've just now prepared a release with a few other changes (all in main currently), so I'll hold this merge a little - wont have time to properly run it through my tests until during the weekend.

No rush with the log feature, that might need some discussion and testing etc anyway to reach a good baseline.

[mag37]

Sorry @vorezal - other things sprung up in between (as you know) and time has been scarce.

I just pushed another release to have one fresh before merging this.
I'll work out the merge conflicts (dosnt look like much) and do some testing locally, so nothing else affected this change, before I merge it to main. I might look into squeezing in some more cleaning and bump it to v0.8.0 to mark a new chapter with this 😄

[vorezal]

Thanks! Sounds good, and no worries. Time is definitely scarce all around.

[mag37]

Epic work as always @vorezal - the conflicts were minor, should've done this earlier but just needed the headspace to feel I grasped things for testing etc.

Ran it through a few tests with containers in different states and stacks. Thank you again.

[vorezal]

Awesome. Thanks for merging!