Log Message:
sysutils/xplr: update to 0.21.5

Changes & fixes
 - Added new messages to make it easier to jump between the deep level
   directories from history (as an alternative to runtime bookmarking).
    - PreviousVisitedDeepBranch
    - NextVisitedDeepBranch
 - New key bindings ( and ) bound to the new messages.
 - Added support for function keys upto F24.
 - Added selection count indicator in Input/Logs panel, so that selection panel
   can be hidden without losing the indicator.
 - Dependency updates.