Create a bar to denote file edit seasons

[stdedos]

Inspired by "history_on_close": false, you could create a bar whenever the file is opened (or even a user-wanted one), to keep a visual track of what is where (could be easily done with a mock-up file name if #77 is done)

[vishr]

/cc @jrappen

[jrappen]

@stdedos Not sure what you mean. Can you try describing that again?

[stdedos]

These all represent different edit seasons. If you could, programmatically, add them to visually indicate that they are separate seasons.

In addition to that, if the user had an option to manually add such line