Bump tcell to fix broken deployment (jesseduffield#4178)

- **PR Description**

See
https://github.com/jesseduffield/lazygit/actions/runs/12829856652/job/35776769332
and gdamore/tcell#768

Improve undo action to restore files upon undoing a commit (jesseduff…

…ield#4167)

- **PR Description**

Right now, undoing a commit performs a hard reset, which also discards
all the changes from that commit. This PR adds new config options (and a
new `undo` section) which allow users to choose between `hard` and
`soft` reset modes when undoing commits.

Personally, I think that the default should be `soft`, because the state
before the commit had the files, so undoing a commit should put the
files where they were before. But this PR keeps `hard` as the default
and does not change current behavior.

- **Please check if the PR fulfills these requirements**

* [x] Cheatsheets are up-to-date (run `go generate ./...`)
* [x] Code has been formatted (see
[here](https://github.com/jesseduffield/lazygit/blob/master/CONTRIBUTING.md#code-formatting))
* [x] Tests have been added/updated (see
[here](https://github.com/jesseduffield/lazygit/blob/master/pkg/integration/README.md)
for the integration test guide)
* [x] Text is internationalised (see
[here](https://github.com/jesseduffield/lazygit/blob/master/CONTRIBUTING.md#internationalisation))
* [x] If a new UserConfig entry was added, make sure it can be
hot-reloaded (see
[here](https://github.com/jesseduffield/lazygit/blob/master/docs/dev/Codebase_Guide.md#using-userconfig))
* [x] Docs have been updated if necessary
* [x] You've read through your own file changes for silly mistakes etc

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Standardise on 'screen mode' naming convention (jesseduffield#4142)

We had some conflicting names: screen-mode, window-size, and
window-maximisation. I think panel-size sounds good.

- **PR Description**

- **Please check if the PR fulfills these requirements**

* [x] Cheatsheets are up-to-date (run `go generate ./...`)
* [x] Code has been formatted (see
[here](https://github.com/jesseduffield/lazygit/blob/master/CONTRIBUTING.md#code-formatting))
* [x] Tests have been added/updated (see
[here](https://github.com/jesseduffield/lazygit/blob/master/pkg/integration/README.md)
for the integration test guide)
* [x] Text is internationalised (see
[here](https://github.com/jesseduffield/lazygit/blob/master/CONTRIBUTING.md#internationalisation))
* [ ] If a new UserConfig entry was added, make sure it can be
hot-reloaded (see
[here](https://github.com/jesseduffield/lazygit/blob/master/docs/dev/Codebase_Guide.md#using-userconfig))
* [x] Docs have been updated if necessary
* [x] You've read through your own file changes for silly mistakes etc

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Be sure to name your PR with an imperative e.g. 'Add worktrees view'
see https://github.com/jesseduffield/lazygit/releases/tag/v0.40.0 for
examples
-->

Merge 06e0acb into 91cb1ff

Fix crash when viewing the divergence of a branch which is up to date…

… with its upstream (jesseduffield#3918)

This was introduced by jesseduffield#3838, specifically by commit e675025.

Fixes jesseduffield#3900 and jesseduffield#3917.

Switch to Files panel after popping a stash (jesseduffield#3888)

#### PR Description

I find myself always switching to the Files panel after popping a stash,
100% of the time, so it makes sense that lazygit does this for me. Do it
for apply as well, for consistency.

#### Please check if the PR fulfills these requirements

* [x] Cheatsheets are up-to-date (run `go generate ./...`)
* [x] Code has been formatted (see
[here](https://github.com/jesseduffield/lazygit/blob/master/CONTRIBUTING.md#code-formatting))
* [x] Tests have been added/updated (see
[here](https://github.com/jesseduffield/lazygit/blob/master/pkg/integration/README.md)
for the integration test guide)
* [ ] Text is internationalised (see
[here](https://github.com/jesseduffield/lazygit/blob/master/CONTRIBUTING.md#internationalisation))
* [ ] If a new UserConfig entry was added, make sure it can be
hot-reloaded (see
[here](https://github.com/jesseduffield/lazygit/blob/master/docs/dev/Codebase_Guide.md#using-userconfig))
* [ ] Docs have been updated if necessary
* [x] You've read through your own file changes for silly mistakes etc

Fix language auto detection (jesseduffield#3744)

- **PR Description**

Fix a regression (introduced with jesseduffield#3649) that broke language
auto-detection. When starting lazygit with the `gui.language` config set
to "auto" (which is the default), lazygit would fail to start if the
LANG environment is set to one of our supported languages.

For example:
```
$ export LANG=nl_NL
$ lazygit
2024/07/13 11:43:03 open translations/nl-NL.json: file does not exist
```

Fixes jesseduffield#3743

README.md: Update Sponsors (jesseduffield#3732)

Automated changes by
[create-pull-request](https://github.com/peter-evans/create-pull-request)
GitHub action

Correctly request force-pushing in a triangular workflow (jesseduffie…

…ld#3528)

- **PR Description**

Some people push to a different branch (or even remote) than they pull
from. One example is described in jesseduffield#3437. Our logic of when to request a
force push is not appropriate for these workflows: we check the
configured upstream branch for divergence, but that's the one you pull
from. We should instead check the push-to branch for divergence.

Fixes jesseduffield#3437.

Fix container detection (jesseduffield#3412)

- **PR Description**

Running WSL without a container would be treated as native linux,
causing problems at it would then attempt to use `xdg-open`. This was
caused by `isContainer()` always returning true due to some dubious
conditionals. These have been removed.

The env-var check seems to not be used by lazygit, nor any common
containers, and therefore appears to only exist to manually tell lazygit
to behave as if it were inside of a container. This functionality has
been kept, but the env-var has been changed to be all uppercaps as to
comply with the POSIX standard.

Fixes jesseduffield#2757
Bug introduced in 4d78d76