x11-fm/worker: update the port to bugfix version 5.0.1

• Fixed a bug introduced in 5.0.0 in text view copy to clipboard where in some situations data might not have been copied to the clipboard completely (occurred when tab characters were inside the selected text)
• Updated Czech translation (thanks to Petr Korviny)
• Per new world order, install manpages under $PREFIX/share/man

Approved by: maintainer