Switch vim keys for Buffer/File opening

Switch fuzzy opening of buffers to <leader>f, and set opening files in
work directory to <leader>F. Switching these two is intended to allow
easier access to buffer switching, which I use much more often than file
access, especially when working over a longer time-frame in vim.

.config/nvim/init.vim

@@ -369,8 +369,8 @@ nnoremap <leader><C-e> :NERDTreeVCS<CR>
 nnoremap <leader>E :NERDTreeFind<CR>
 
 " Call leaderf with <leader-f> (necessary to enable leaderf lazyloading)
-nnoremap <leader>f :LeaderfFile<cr>
-nnoremap <leader>F :LeaderfBuffer<cr>
+nnoremap <leader>F :LeaderfFile<cr>
+nnoremap <leader>f :LeaderfBuffer<cr>
 
 function! SearchWiki()
   let l:curpath=getcwd()