`ScreenMovement()` in visual mode only

`vnoremap` covers both visual and select mode. `xnoremap` covers only visual
mode, `snoremap` covers only select mode. This is significant for snippet
completion of variables, because with `vnoremap` typing 'j' and 'k' moves the
selection cursor up and down.

vim/vimrc

@@ -273,11 +273,11 @@ nnoremap <silent> <expr> k ScreenMovement("k")
 nnoremap <silent> <expr> 0 ScreenMovement("0")
 nnoremap <silent> <expr> ^ ScreenMovement("^")
 nnoremap <silent> <expr> $ ScreenMovement("$")
-vnoremap <silent> <expr> j ScreenMovement("j")
-vnoremap <silent> <expr> k ScreenMovement("k")
-vnoremap <silent> <expr> 0 ScreenMovement("0")
-vnoremap <silent> <expr> ^ ScreenMovement("^")
-vnoremap <silent> <expr> $ ScreenMovement("$")
+xnoremap <silent> <expr> j ScreenMovement("j")
+xnoremap <silent> <expr> k ScreenMovement("k")
+xnoremap <silent> <expr> 0 ScreenMovement("0")
+xnoremap <silent> <expr> ^ ScreenMovement("^")
+xnoremap <silent> <expr> $ ScreenMovement("$")
 
 
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