feat: support toggling 'whole file' annotations

[tjkandala]

The toggle action now cycles through 'none' (no annotations), 'line' (annotations only for selected lines) and 'file' (annotations for all lines).

I tried to make this as backwards compatible as possible, but the first toggle for existing users may be a bit awkward.

[felixfbecker]

Is this the best UX? I wonder what is more common:

1. Switching between one-line vs all-lines
2. Switching between on and off (any decorations or no decorations)

If (2) is common, and (1) is rather rare, we should decouple the settings, keep (2) as the sole function of the toggle and allow switching (1) through a command in the command palette and/or through the altAction of the button. We also can explain the alt action in the tooltip.

I'm personally leaning towards that, thoughts @sourcegraph/web @AlicjaSuska ?

[AlicjaSuska]

I really like this change of cycling through 3 states. I think it's relatively easy to learn. After the first use, there should be no problem imo.

I think that your solution @felixfbecker is ok as well but it may be way harder to discover. I would go with @tjkandala 's change 👍

[felixfbecker]

The other setting should be removed, right?

[tjkandala]

Correct

[AlicjaSuska]

@tjkandala there is a bug: when the extension is 'off' is shouldn't be highlighted anymore. Shown at the end of the video:

https://www.loom.com/share/e650ef2d8dcf422a83aae74707138e50

[tjkandala]

@tjkandala there is a bug: when the extension is 'off' is shouldn't be highlighted anymore. Shown at the end of the video:

Thanks for spotting this, I think it's because I kept references to the old settings in an attempt to be backwards compatible, but that is a lot more trouble than it's worth. I'll simplify the settings and this should go away

[felixfbecker]

@tjkandala just make sure that the visual pressed state stays correct even for users who were users of git blame before and that it defaults to "line" (on). I think it's fine to ignore any old setting.

[felixfbecker]

@tjkandala checking in - are you working on the fix for the problem @AlicjaSuska pointed out?

[tjkandala]

Update: "onboarding" users with deprecated settings more gracefully now. Update configuration based on deprecated settings when the new setting, git.blame.decorations, is not set.