invoice/ui: shell, rename invoice to invoices
version: bump to v1.1.6
invoice/ui: print first 50 chars of desc on ls
invoice/ui: limit 50 chars of first line in desc for ls
invoice/ui: remove newline of printed desc on ls
cli_interface: remove legacy invoice generation
cli_interface.rb: robustness fix
cli_interface: update help command
edit_handler: minor refactor
cli_interface: add forgotten comma
edit_handler: fix broken due date
edit_handler: fix parameter name in time_handle
edit_handler: add sysconfig string decorator (missing)
edit_handler: AR style update for issue
ui/commands/attach_to_log_entry: unused - remove
commands: move create issue into main commands folder