nnn v5.1 Moscow Mule

nnn v5.1 Moscow Mule release notes.

• add support for custom trash function
• remember history of last 16 commands executed in the native prompt in the current session
• count files from selection file when no file is selected during selection removal
• show session name in help
• show current entry in reversed bold
• show current (non-auto) session name at save session prompt
• show F in the status bar when filter is inactive in type-to-nav mode
• restore correct filter function on session load, switch filter function on context changes
• extend xreadline() with some by-word movement
• added plugins gpgs and gpgv
• add icon for lzip files, more emoji icons
• suffix the current context number with * in help screen