Adds a configuration option to disable auto-centering of the filmstirp

[masterpiga]

Auto-centering can be problematic, especially when working on a sequence of similar looking images.
The filmstrip moves back and forth and one loses track of where the previous image was.

This only adds a hidden config option, i.e., no changes to the preferences UI.

I would be happy to add that as well if this PR is accepted and the addition is deemed worthy.

[wpferguson]

Are there cases where it's valuable to have the auto centering on? If there is, would a toggle or shortcut make more sense so that you could enable and disable as needed?

[masterpiga]

@wpferguson sorry, for some reason I didn't get notification emails for this PR.

Sure, I am happy to add both if you agree that it's good to have. The minimalistic PR was meant just to test the water.

[wpferguson]

When I asked the question, it was truly just a question. I don't use filmstrip, so I don't know the answer. Maybe ask it on pixls.us? Although lately it seems that any question there turns into a long conversation really quick.

[masterpiga]

Sounds good, grab your popcorn! 😝

https://discuss.pixls.us/t/pr-discussion-disabling-film-strip-autocentering/56685?u=masterpiga

[wpferguson]

🤣

[TurboGit]

Thanks!

This is currently an hidden pref, so really no problem and I could have merged this sooner. Now if needed I'm ok for an entry in the preferences if really needed. I'm not sure a new welcome screen is a good idea as this sounds like a very minor point, but we can discuss.