Add keymappings to vifm: sync panes, hide dotfiles

Set the current pane to the other pane with <c-y>. Hide dotfiles with zc
(zm still works) to mimic the vim behavior.

.config/vifm/vifmrc

@@ -473,6 +473,13 @@ nnoremap te :execute ':tree! | echo ":tree"'<cr>
 nnoremap t <nop>
 nnoremap tt t
 
+" Switch pane to same directory as opposite pane
+nnoremap <c-y> :cd %D<cr>
+
+" zo shows hidden files, mimicking fold open in vim -- why does zc not close
+" again?
+nnoremap zc zm
+
 " }}}
 "
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