Closes with error 114 on trying to open file in reflog

**Describe the bug**
Closes with error 114 on trying to open file in reflog

**To Reproduce**
Steps to reproduce the behavior:
1. go to panel 4 (reflog)
2. choose commit
3. choose file and press enter
4. press o (open)
4. See error

**Expected behavior**
open file in default text editor?

**Screenshots**
*errors.errorString unknown main context: normal
github.com/jesseduffield/lazygit/pkg/gui/line_by_line_panel.go:349 (0x55caac7f7605)
github.com/jesseduffield/lazygit/pkg/gui/line_by_line_panel.go:415 (0x55caac7cd036)
github.com/jesseduffield/lazygit/pkg/gui/line_by_line_panel.go:336 (0x55caac7cccd0)
github.com/jesseduffield/lazygit/pkg/gui/view_helpers.go:404 (0x55caac800de8)
github.com/jesseduffield/lazygit/pkg/gui/options_menu_panel.go:64 (0x55caac7f99ac)
github.com/jesseduffield/lazygit/pkg/gui/menu_panel.go:98 (0x55caac7d355a)
github.com/jesseduffield/lazygit/pkg/gui/view_helpers.go:404 (0x55caac800de8)
github.com/jesseduffield/gocui@v0.3.1-0.20210208224444-2eecee85583d/gui.go:963 (0x55caac762b3d)
github.com/jesseduffield/gocui@v0.3.1-0.20210208224444-2eecee85583d/gui.go:943 (0x55caac762b3e)
github.com/jesseduffield/gocui@v0.3.1-0.20210208224444-2eecee85583d/gui.go:863 (0x55caac7628bd)
github.com/jesseduffield/gocui@v0.3.1-0.20210208224444-2eecee85583d/gui.go:551 (0x55caac760f48)
github.com/jesseduffield/gocui@v0.3.1-0.20210208224444-2eecee85583d/gui.go:499 (0x55caac760909)
github.com/jesseduffield/lazygit/pkg/gui/gui.go:507 (0x55caac7ae945)
github.com/jesseduffield/lazygit/pkg/gui/gui.go:520 (0x55caac7aee28)
github.com/jesseduffield/lazygit/pkg/app/app.go:240 (0x55caac80df93)
github.com/jesseduffield/lazygit/main.go:126 (0x55caac80f8bb)
runtime/proc.go:225 (0x55caac2760c3)
runtime/asm_amd64.s:1371 (0x55caac2aa2e1)

**Desktop (please complete the following information):**
- OS: Arch linux
commit=v0.26.1, build date=2021-03-14T15:38:47Z, build source=binaryRelease, version=0.26.1, os=linux, arch=amd64