sysutils/xplr: update to 0.5.0

New:
-Added support for sorting and filtering files using s and f key.
-Added read only mode. (general.read_only)
-Use ctrl-r to refresh UI when messed up.
-Follow symlink files to their parent directory using l or enter.
-Display file size.
-Added new UI variables canonical.*, symlink.*. (see this])

Changes:
-Improved filter messages. (see this)
-Improved input handling
-Added messages RemoveInputBufferLastCharacter, RemoveInputBufferLastWord.
-Use backspace to delete the last character, ctrl-w to delete the last word,
ctrl-u to delete the line.
-Improved selection
-Use ctrl-a to toggle select all, ctrl-u to unselect all.
-Improved UI.

Fixes:
-Handle empty icon.
-Fixed selection duplicates.

(pin)