- ssh-agent is now used by default for ssh repos
- add userpass dialog for better https repo support
- fix a bottleneck in the file-manager plugin and service communication
- no longer use update_file_info_full in file-manager plugin due to crashes
- show a turtle emblem on repo main folder, status emblem can be enabled in the settings
- add website and issue-url to about dialog
- minor fixes and refactoring