Gitnuro

## Changes
* Added Git LFS support
* Added diff highlight
* Added labels to some buttons to inform about their keybindings.
* Added date time formatting settings.
* Implemented SSH credentials caching. https://github.com/JetpackDuba/Gitnuro/issues/266
* Removed commits limit in the log (implemented lazy loading)
* Reduced recent repositories height and added relative pathing to the parent directory
* Added log refresh after deleting stash
* Added stashes visualization in the graph
* Added automatic snapshot of uncommited changes before merge
* Copy Branch Name (implemented by @spipau) https://github.com/JetpackDuba/Gitnuro/issues/264
* Gravatar usage can be now disabled. When used, now the email addresses are hashed using SHA256.
* Added separator to branches context menu


## Fixes
- In rebase interactive, fixed clicking on another input field (Reword) crashes the app
- In rebase interactive, fixed rewording multiple commits inverses messages and puts them on the wrong commit
- Fixed unnecessary refreshes when opening files, which could end up in infinite loop in certain repositories/systems.
- Fixed line in commit graph not scaling
- Fixed crash when pushing