edit cmd misleading when focusing commit msg in inspect view

**Describe the bug**
This is the best git tool, light, simple and visual!
However, I have found one that does not work as intended.
When in inspect mode on the Log tab, I cannot edit the commit message by clicking `shift + i` (vim keybinding).

**To Reproduce**
Steps to reproduce the behavior:
1. Go to Log tab
2. Click on `enter` and `l`(Inspect)
3. Focus Message block
4. click `shift + i`

**Expected behavior**
Able to edit commit messages.

**Screenshots**
If applicable, add screenshots to help explain your problem.

**Context (please complete the following information):**
- OS/Distro + Version: `macOS 12.5.1`
- GitUI Version `0.22.1`
- Rust version: `1.64`

**Additional context**
Log of the operation.
```
14:53:56 [TRACE] (6) mio::poll: [/Users/brew/Library/Caches/Homebrew/cargo_cache/registry/src/github.com-1ecc6299db9ec823/mio-0.8.5/src/poll.rs:532] registering event source with poller: token=Token(0), interests=READABLE
14:53:56 [TRACE] (1) gitui::watcher: [src/watcher.rs:21] poll watcher: false recommended: Fsevent
14:53:56 [TRACE] (6) mio::poll: [/Users/brew/Library/Caches/Homebrew/cargo_cache/registry/src/github.com-1ecc6299db9ec823/mio-0.8.5/src/poll.rs:532] registering event source with poller: token=Token(1), interests=READABLE
14:53:56 [TRACE] (1) gitui::app: [src/app.rs:119] open repo at: RefCell { value: Path(".") }
14:53:56 [TRACE] (1) asyncgit::tags: [asyncgit/src/tags.rs:67] request
14:53:56 [TRACE] (1) gitui: [src/main.rs:200] app start: 4 ms
14:53:56 [TRACE] (1) gitui::app: [src/app.rs:477] update
14:53:56 [TRACE] (1) asyncgit::tags: [asyncgit/src/tags.rs:67] request
14:53:56 [TRACE] (1) gitui::app: [src/app.rs:496] update_async: Git(Tags)
14:53:56 [TRACE] (1) asyncgit::tags: [asyncgit/src/tags.rs:67] request
14:53:56 [TRACE] (1) gitui::app: [src/app.rs:496] update_async: Git(Branches)
14:53:56 [TRACE] (1) asyncgit::tags: [asyncgit/src/tags.rs:67] request
14:53:56 [TRACE] (1) gitui::app: [src/app.rs:496] update_async: Git(Tags)
14:53:56 [TRACE] (1) asyncgit::tags: [asyncgit/src/tags.rs:67] request
14:53:56 [TRACE] (1) gitui::app: [src/app.rs:496] update_async: Git(Branches)
14:53:56 [TRACE] (1) gitui::app: [src/app.rs:496] update_async: Git(Log)
14:53:56 [TRACE] (1) asyncgit::tags: [asyncgit/src/tags.rs:67] request
14:53:56 [TRACE] (1) gitui::app: [src/app.rs:496] update_async: Git(Log)
14:53:56 [TRACE] (1) asyncgit::tags: [asyncgit/src/tags.rs:67] request
14:53:58 [TRACE] (1) gitui::app: [src/app.rs:382] event: Input(Key(KeyEvent { code: Enter, modifiers: NONE, kind: Press, state: NONE }))
14:53:58 [TRACE] (1) asyncgit::tags: [asyncgit/src/tags.rs:67] request
14:53:58 [TRACE] (1) asyncgit::commit_files: [asyncgit/src/commit_files.rs:83] request: CommitFilesParams { id: CommitId(d37cf315857616304739afcc65155f049347c25f), other: None }
14:53:58 [TRACE] (2) asyncgit::commit_files: [asyncgit/src/commit_files.rs:128] get_commit_files: CommitFilesParams { id: CommitId(d37cf315857616304739afcc65155f049347c25f), other: None } (1)
14:53:58 [TRACE] (1) gitui::app: [src/app.rs:496] update_async: Git(CommitFiles)
14:53:58 [TRACE] (1) asyncgit::tags: [asyncgit/src/tags.rs:67] request
14:53:58 [DEBUG] (8) gitui::watcher: notify events: 1
14:53:58 [DEBUG] (8) gitui::watcher: notify [0]: DebouncedEvent { path: "/Users/aktdaaaa/sample/.git/gitui", kind: Any }
14:53:58 [TRACE] (1) gitui::app: [src/app.rs:477] update
14:53:58 [TRACE] (1) asyncgit::tags: [asyncgit/src/tags.rs:67] request
14:54:00 [TRACE] (1) gitui::app: [src/app.rs:382] event: Input(Key(KeyEvent { code: Char('l'), modifiers: NONE, kind: Press, state: NONE }))
14:54:00 [TRACE] (1) asyncgit::commit_files: [asyncgit/src/commit_files.rs:83] request: CommitFilesParams { id: CommitId(d37cf315857616304739afcc65155f049347c25f), other: None }
14:54:00 [TRACE] (1) gitui::app: [src/app.rs:477] update
14:54:00 [TRACE] (2) asyncgit::commit_files: [asyncgit/src/commit_files.rs:128] get_commit_files: CommitFilesParams { id: CommitId(d37cf315857616304739afcc65155f049347c25f), other: None } (1)
14:54:00 [TRACE] (1) asyncgit::tags: [asyncgit/src/tags.rs:67] request
14:54:00 [TRACE] (1) gitui::app: [src/app.rs:496] update_async: Git(CommitFiles)
14:54:00 [TRACE] (1) asyncgit::tags: [asyncgit/src/tags.rs:67] request
14:54:00 [TRACE] (1) asyncgit::diff: [asyncgit/src/diff.rs:98] request DiffParams { path: "DataTypes.md", diff_type: Commit(CommitId(d37cf315857616304739afcc65155f049347c25f)), options: DiffOptions { ignore_whitespace: false, context: 3, interhunk_lines: 0 } }
14:54:00 [TRACE] (1) gitui::app: [src/app.rs:496] update_async: Git(Diff)
14:54:01 [TRACE] (1) gitui::app: [src/app.rs:382] event: Input(Key(KeyEvent { code: Char('k'), modifiers: NONE, kind: Press, state: NONE }))
14:54:03 [TRACE] (1) gitui::app: [src/app.rs:382] event: Input(Key(KeyEvent { code: Char('I'), modifiers: SHIFT, kind: Press, state: NONE }))
14:54:05 [TRACE] (1) gitui::app: [src/app.rs:382] event: Input(Key(KeyEvent { code: Char('I'), modifiers: SHIFT, kind: Press, state: NONE }))
14:54:05 [TRACE] (1) gitui::app: [src/app.rs:382] event: Input(Key(KeyEvent { code: Char('I'), modifiers: SHIFT, kind: Press, state: NONE }))
14:54:07 [TRACE] (1) gitui::app: [src/app.rs:382] event: Input(Key(KeyEvent { code: Char('c'), modifiers: CONTROL, kind: Press, state: NONE }))
```