Added Incremental Saving

[Azagwen]

This PR adds incremental saving, similar to what can be seen in Blender and Autodesk Maya.

electron_C324kLsoPc.mp4

This would be useful to keep past versions of a given project file, without having to set up boilerplate version control tools like Git.

Would close #2360

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[Azagwen]

At the moment this uses RegEx to isolate and add to the file name before .bbmodel, let me know if I should try another maybe more reliable or proper way

[Azagwen]

an issue I found with the current ways this works; re-saving incrementally from a previous version overwrites versions above it
I could fix this by either:

• changing it so that the version nb is based on the date & hour instead of a flat integer
• checking if a file named the same exists in this spot, and saving a "bis" version if it does exist

Let me know your thoughts!

[Azagwen]

another thing; this doesn't seem to work on the web version, since there is no project path when editing in a web browser

[JannisX11]

I changed some things. I made the action only available when it'll actually do something useful. And I added a check for if the file already exists. I added a modification to the file name, since I think numbers are more intuitive than something like date or time in this case.

[Azagwen]

Something I've been thinking of recently to complement this:
The interation number could be written to the saved file, this would technically fix web app not incrementing, and be a reliable way beyond just the file name to tell which iteration a given file is 🤔

[Azagwen]

I changed some things. I made the action only available when it'll actually do something useful. And I added a check for if the file already exists. I added a modification to the file name, since I think numbers are more intuitive than something like date or time in this case.

Nice! And yeah that makes sense, most other apps also only do this with a single number that gets incremented

[JannisX11]

Something I've been thinking of recently to complement this: The interation number could be written to the saved file, this would technically fix web app not incrementing, and be a reliable way beyond just the file name to tell which iteration a given file is 🤔

I think the file name is reliable enough for remembering the number, and it gives the user a way to manually tweak it without needing a UI for it. And I'm not concerned about the web app not having it. On the web app just pressing Save Project already pretty much does the same thing, at least unless you have file saving dialogs enabled in the browser.