[Enhancement] Optimize fetch `prune` behavior

[gadfly3173]

Current behavior of Fetch operation:

• Fetch popup: Follow the prune settings in the popup
• Auto Fetch: force prune
• Add Remote popup: force prune
• Pull popup: NEVER prune

After I delete a branch at remote, Pull will never remove the deleted remote branch. I need to click Fetch popup or wait for AutoFetch again.
I suggest to unify the prune settings and behavior in SourceGit.

[love-linger]

There are two ways to do this:

1. Removes all --prune parameter from git fetch command. And users can only do this job from the context menu of remote:
   

2. Unify all fetch-related features:

• Fetch will keep current design
• Auto-Fetch should not using --prune because it is not controlled by user. For example, if a remote branch is deleted by accident, we can still re-push it from our local repository.
• Add Remote should not using --prune since it is a new remote
• Add a toggle to Push popup that controls whether the --prune parameter is enabled

Currently, I prefer the first solution

[love-linger]

Done.

[gadfly3173]

LGTM

[Gama11]

Hm, I'm not a fan of needing to perform one additional manual action every time I want to get rid of old merged pull request branches. :/

[gadfly3173]

Hm, I'm not a fan of needing to perform one additional manual action every time I want to get rid of old merged pull request branches.

You can do that through git itself.

• Always auto prune: (add --global if you want every repository has it)

git config fetch.prune true

• Only prune remote with name origin:

git config remote.origin.prune true

[Gama11]

Thanks, that's good to know! 👍

[gadfly3173]

How about adding this configuration to the preferences, or adding an option just for SourceGit? @love-linger

Here are some other tools that handle this functionality.

GitKraken (default enabled) :

https://github.com/mhutchie/vscode-git-graph (default disabled) :

https://github.com/zielu/GitToolBox (default enabled with delay) :

[love-linger]

Done. You can download the latest CI build from Github Action.